characters/humanoid_model.gd

@@ -36,6 +36,8 @@ var movement_speed: float = 0.0
 var _anim_time: float = 0.0
 
 func _ready() -> void:
+	rotation_degrees.y = 180
+	
 	var mat := StandardMaterial3D.new()
 	mat.albedo_color = color
 	mat.roughness = 0.8
@@ -197,7 +199,6 @@ func set_weapon(script_path: String) -> void:
 			_set_shadows_recursive(w)
 			
 		# Force position after the weapon's _build_model() sets it for 1st person
-		# root_pivot is rotated 180 deg around Y, so local +Z is FORWARD and local -X is RIGHT
 		w.position = Vector3(-0.15, 1.0, 0.4)
 		w.rotation_degrees = Vector3(0, 180, 0)
 	)

debug/test_level_builder.gd

@@ -301,6 +301,15 @@ func _spawn_player(pid: int) -> CharacterBody3D:
 	rep_config.add_property(":position")
 	rep_config.add_property(":rotation")
 	rep_config.add_property("HeadPivot:rotation")
+	rep_config.add_property(":synced_movement_state")
+	rep_config.add_property(":synced_movement_speed")
+	rep_config.add_property(":synced_is_crouching")
+	rep_config.add_property(":synced_weapon_path")
+	rep_config.add_property(":synced_loadout_p1")
+	rep_config.add_property(":synced_loadout_p2")
+	rep_config.add_property(":synced_loadout_sp")
+	rep_config.add_property(":synced_loadout_melee")
+	rep_config.add_property(":synced_loadout_ready")
 	sync.replication_config = rep_config
 	player.add_child(sync)
 
@@ -395,9 +404,10 @@ func _spawn_player(pid: int) -> CharacterBody3D:
 		player.set_process(true)
 		sm.set_physics_process(true)
 	else:
-		# Disable processing/input for remote players
+		# Disable physics processing/input for remote players
+		# but keep _process enabled so synced state updates the HumanoidModel
 		player.set_physics_process(false)
-		player.set_process(false)
+		player.set_process(true)
 		player.set_process_input(false)
 		sm.set_physics_process(false)
 		sm.set_process(false)
@@ -410,6 +420,10 @@ func _spawn_player(pid: int) -> CharacterBody3D:
 			wman.set_process_input(false)
 			wman.set_process(false)
 			wman.set_physics_process(false)
+			wman.visible = false
+			var cv = wman.get("canvas_layer")
+			if cv:
+				cv.visible = false
 
 	return player
 

entities/killable_dummy.gd

@@ -39,7 +39,7 @@ func _ready() -> void:
 	
 	_update_label()
 
-func take_damage(amount: float, hit_position: Vector3, source: Node = null) -> void:
+func take_damage(amount: float, hit_position: Vector3, source: Node = null, impulse: Vector3 = Vector3.ZERO) -> void:
 	if is_dead:
 		return
 		

entities/target_dummy.gd

@@ -33,7 +33,7 @@ func _ready() -> void:
 	dps_label.modulate = Color(1, 0.8, 0)
 	add_child(dps_label)
 
-func take_damage(amount: float, hit_position: Vector3, source: Node = null) -> void:
+func take_damage(amount: float, hit_position: Vector3, source: Node = null, impulse: Vector3 = Vector3.ZERO) -> void:
 	var now = Time.get_ticks_msec() / 1000.0
 	damage_history.append({"time": now, "amount": amount})
 	

entities/walking_dummy.gd

@@ -82,7 +82,7 @@ func _physics_process(delta: float) -> void:
 		var current_h_speed = Vector2(velocity.x, velocity.z).length()
 		visual_node.update_state("ground", current_h_speed)
 
-func take_damage(amount: float, hit_position: Vector3, source: Node = null) -> void:
+func take_damage(amount: float, hit_position: Vector3, source: Node = null, impulse: Vector3 = Vector3.ZERO) -> void:
 	if is_dead:
 		return
 		

movement/player_movement_controller.gd

@@ -48,6 +48,19 @@ var _hit_marker_tween: Tween
 # Grapple
 var grapple_rope: MeshInstance3D
 
+# ── Multiplayer Sync Variables ─────────────────────────────────────────────
+# These are written by the authority each frame and replicated to remote peers
+# via the MultiplayerSynchronizer properties.
+var synced_movement_state: String = "idle"
+var synced_movement_speed: float = 0.0
+var synced_is_crouching: bool = false
+var synced_weapon_path: String = ""
+
+var synced_loadout_p1: String = ""
+var synced_loadout_p2: String = ""
+var synced_loadout_sp: String = ""
+var synced_loadout_melee: String = ""
+var synced_loadout_ready: bool = false
 
 func _ready() -> void:
 	var sm := _ensure_machine()
@@ -61,16 +74,30 @@ func _ready() -> void:
 	if head_pivot:
 		camera = head_pivot.get_node_or_null("Camera3D")
 
-	_damage_layer = CanvasLayer.new()
-	add_child(_damage_layer)
-	
 	_setup_audio()
-	_setup_hit_marker()
 	_setup_grapple()
-	_setup_hud()
+	
+	if is_multiplayer_authority():
+		_damage_layer = CanvasLayer.new()
+		add_child(_damage_layer)
+		_setup_hit_marker()
+		_setup_hud()
+	else:
+		call_deferred("_hide_remote_weapons")
 
 	set_process(true)
-	set_physics_process(true)
+	if is_multiplayer_authority():
+		set_physics_process(true)
+
+func _hide_remote_weapons() -> void:
+	if camera:
+		var wman = camera.get_node_or_null("WeaponManager")
+		if wman:
+			wman.visible = false
+			wman.process_mode = Node.PROCESS_MODE_DISABLED
+			var cv = wman.get("canvas_layer")
+			if cv:
+				cv.visible = false
 
 func _setup_audio() -> void:
 	footstep_player = AudioStreamPlayer.new()
@@ -219,16 +246,9 @@ func apply_impulse(force: Vector3) -> void:
 		global_position.y += 0.1
 
 func take_damage(amount: float, _hit_pos: Vector3, _source: Node3D = null, impulse: Vector3 = Vector3.ZERO) -> void:
-	if is_dead:
-		if is_instance_valid(ragdoll_instance):
-			ragdoll_instance.apply_initial_velocities(Vector3.ZERO, impulse)
-		return
-		
-	# Show damage number for self-damage
-	spawn_damage_number(amount, _hit_pos)
-	
-	# Handle damage tracking for assists
 	var attacker_id = 0
+	var weapon_name = "Killed"
+	
 	if _source:
 		if _source.has_method("get_multiplayer_authority"):
 			attacker_id = _source.get_multiplayer_authority()
@@ -237,6 +257,198 @@ func take_damage(amount: float, _hit_pos: Vector3, _source: Node3D = null, impul
 		elif _source is CharacterBody3D:
 			attacker_id = int(str(_source.name))
 			
+		if _source.has_method("get_weapon_name"):
+			weapon_name = _source.get_weapon_name()
+			
+	# If this is singleplayer offline, just call it directly
+	if not multiplayer.has_multiplayer_peer() or multiplayer.multiplayer_peer is OfflineMultiplayerPeer:
+		rpc_take_damage(amount, _hit_pos, attacker_id, weapon_name, impulse)
+	else:
+		# Tell the server to handle the damage and broadcast it to everyone!
+		server_take_damage.rpc_id(1, amount, _hit_pos, attacker_id, weapon_name, impulse)
+
+@rpc("any_peer", "call_local", "unreliable")
+func server_play_fire_effects(origin: Vector3, target_or_dir: Vector3, weapon_name: String, is_hitscan: bool) -> void:
+	if not multiplayer.is_server(): return
+	rpc_play_fire_effects.rpc(origin, target_or_dir, weapon_name, is_hitscan)
+
+@rpc("any_peer", "call_local", "unreliable")
+func rpc_play_fire_effects(origin: Vector3, target_or_dir: Vector3, _weapon_name: String, is_hitscan: bool) -> void:
+	# Local player already spawned effects locally with 0 latency
+	if is_multiplayer_authority(): return
+	
+	if is_hitscan:
+		# Spawn a standalone tracer directly into the scene
+		_spawn_remote_tracer(origin, target_or_dir)
+	else:
+		# Spawn a visual-only projectile flying from origin along the direction
+		_spawn_remote_projectile(origin, target_or_dir, _weapon_name)
+
+func _spawn_remote_tracer(origin: Vector3, target: Vector3) -> void:
+	var tracer = Node3D.new()
+	tracer.set_script(load("res://weapons/hitscan_tracer.gd"))
+	
+	var t_mesh_inst = MeshInstance3D.new()
+	var t_mesh = CapsuleMesh.new()
+	t_mesh.radius = 0.02
+	t_mesh.height = 1.0
+	var t_mat = StandardMaterial3D.new()
+	t_mat.albedo_color = Color(1.0, 0.8, 0.2)
+	t_mat.emission_enabled = true
+	t_mat.emission = Color(2.0, 1.5, 0.5)
+	t_mesh.material = t_mat
+	
+	t_mesh_inst.mesh = t_mesh
+	t_mesh_inst.rotation.x = deg_to_rad(90)
+	t_mesh_inst.position = Vector3(0, 0, -0.5)
+	tracer.add_child(t_mesh_inst)
+	
+	tracer.target_position = target
+	
+	if origin.distance_squared_to(target) > 0.1:
+		get_tree().current_scene.add_child(tracer)
+		tracer.global_position = origin
+		
+		var up_vec = Vector3.UP
+		if abs((target - origin).normalized().dot(up_vec)) > 0.99:
+			up_vec = Vector3.RIGHT
+		tracer.look_at(target, up_vec)
+
+func _spawn_remote_projectile(origin: Vector3, fire_dir: Vector3, weapon_name: String) -> void:
+	# Spawn a visual-only projectile (no damage, just the mesh flying)
+	var proj = Node3D.new()
+	proj.name = "RemoteProjectile"
+	
+	if weapon_name == "Plasma Gun":
+		var mesh_instance = MeshInstance3D.new()
+		var p_mesh = SphereMesh.new()
+		p_mesh.radius = 0.08
+		p_mesh.height = 0.16
+		var mat = StandardMaterial3D.new()
+		mat.albedo_color = Color(0.2, 0.6, 1.0)
+		mat.emission_enabled = true
+		mat.emission = Color(0.2, 0.6, 1.0)
+		mat.emission_energy_multiplier = 5.0
+		p_mesh.material = mat
+		mesh_instance.mesh = p_mesh
+		proj.add_child(mesh_instance)
+		
+		var light = OmniLight3D.new()
+		light.light_color = Color(0.2, 0.6, 1.0)
+		light.light_energy = 2.0
+		light.omni_range = 4.0
+		proj.add_child(light)
+	else:
+		# Rocket-shaped mesh (cone + cylinder)
+		var mesh_inst = MeshInstance3D.new()
+		var p_mesh = CylinderMesh.new()
+		p_mesh.top_radius = 0.0
+		p_mesh.bottom_radius = 0.05
+		p_mesh.height = 0.2
+		var mat = StandardMaterial3D.new()
+		mat.albedo_color = Color(0.8, 0.2, 0.2)
+		mat.emission_enabled = true
+		mat.emission = Color(1.5, 0.3, 0.1)
+		p_mesh.material = mat
+		mesh_inst.mesh = p_mesh
+		mesh_inst.rotation.x = deg_to_rad(-90)
+		proj.add_child(mesh_inst)
+		
+		# Smoke trail
+		var smoke = GPUParticles3D.new()
+		var smoke_mat = ParticleProcessMaterial.new()
+		smoke_mat.direction = Vector3(0, 0, 1)
+		smoke_mat.spread = 5.0
+		smoke_mat.initial_velocity_min = 0.0
+		smoke_mat.initial_velocity_max = 0.5
+		smoke_mat.gravity = Vector3(0, 0.5, 0)
+		smoke.process_material = smoke_mat
+		smoke.amount = 20
+		smoke.lifetime = 0.5
+		smoke.position = Vector3(0, 0, 0.1)
+		
+		var smoke_mesh = SphereMesh.new()
+		smoke_mesh.radius = 0.04
+		var smoke_mesh_mat = StandardMaterial3D.new()
+		smoke_mesh_mat.albedo_color = Color(0.5, 0.5, 0.5, 0.6)
+		smoke_mesh_mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
+		smoke_mesh.material = smoke_mesh_mat
+		smoke.draw_pass_1 = smoke_mesh
+		proj.add_child(smoke)
+	
+	# Orient the projectile in the direction of fire
+	var up_vec = Vector3.UP
+	if abs(fire_dir.normalized().dot(up_vec)) > 0.99:
+		up_vec = Vector3.RIGHT
+	
+	get_tree().current_scene.add_child(proj)
+	proj.global_position = origin
+	proj.look_at(origin + fire_dir, up_vec)
+	
+	# Animate movement using tween at appropriate speed
+	var speed = 35.0 if weapon_name != "Plasma Gun" else 80.0
+	var end_pos = origin + fire_dir.normalized() * (speed * 5.0)
+	var tween = get_tree().create_tween()
+	tween.tween_property(proj, "global_position", end_pos, 5.0)
+	tween.tween_callback(proj.queue_free)
+
+@rpc("any_peer", "call_local", "reliable")
+func server_play_explosion(pos: Vector3, radius: float) -> void:
+	if not multiplayer.is_server(): return
+	rpc_play_explosion.rpc(pos, radius)
+
+@rpc("any_peer", "call_local", "reliable")
+func rpc_play_explosion(pos: Vector3, radius: float) -> void:
+	if is_multiplayer_authority(): return
+	
+	var visual = MeshInstance3D.new()
+	var s_mesh = SphereMesh.new()
+	s_mesh.radius = radius
+	s_mesh.height = radius * 2.0
+	visual.mesh = s_mesh
+	
+	var mat = StandardMaterial3D.new()
+	mat.albedo_color = Color(1.0, 0.5, 0.0, 0.6) # Translucent orange
+	mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
+	mat.emission_enabled = true
+	mat.emission = Color(1.0, 0.3, 0.0)
+	visual.material_override = mat
+	
+	visual.position = pos
+	get_tree().current_scene.add_child(visual)
+	
+	var tween = visual.create_tween()
+	tween.tween_property(mat, "albedo_color:a", 0.0, 0.3)
+	tween.parallel().tween_property(visual, "scale", Vector3(1.1, 1.1, 1.1), 0.3)
+	tween.tween_callback(visual.queue_free)
+	
+	var audio = AudioStreamPlayer3D.new()
+	audio.stream = load("res://assets/sounds/shotgun_fire.wav")
+	audio.bus = "SFX"
+	audio.pitch_scale = 0.7
+	audio.max_distance = 150.0
+	get_tree().current_scene.add_child(audio)
+	audio.global_position = pos
+	audio.play()
+	audio.finished.connect(audio.queue_free)
+
+@rpc("any_peer", "call_local", "reliable")
+func server_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_name: String, impulse: Vector3) -> void:
+	if not multiplayer.is_server(): return
+	# Broadcast damage event to all peers so the victim dies on all screens
+	rpc_take_damage.rpc(amount, hit_pos, attacker_id, weapon_name, impulse)
+
+@rpc("any_peer", "call_local", "reliable")
+func rpc_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_name: String, impulse: Vector3) -> void:
+	if is_dead:
+		if is_instance_valid(ragdoll_instance):
+			ragdoll_instance.apply_initial_velocities(Vector3.ZERO, impulse)
+		return
+		
+	# Show damage number for the attacker
+	if not multiplayer.has_multiplayer_peer() or attacker_id == multiplayer.get_unique_id():
+		spawn_damage_number(amount, hit_pos)
+	
 	if attacker_id != 0:
 		recent_attackers[attacker_id] = Time.get_ticks_msec() / 1000.0
 
@@ -256,28 +468,18 @@ func take_damage(amount: float, _hit_pos: Vector3, _source: Node3D = null, impul
 			health = 0.0
 			die(impulse)
 			
-			if get_node_or_null("/root/NetworkManager") and multiplayer.has_multiplayer_peer():
-				var victim_id = multiplayer.get_unique_id() if is_multiplayer_authority() else int(str(name))
-				var killer_id = 0
-				var weapon_name = "Killed"
-				
-				var assist_ids: Array = []
-				var now = Time.get_ticks_msec() / 1000.0
-				for aid in recent_attackers.keys():
-					if aid != killer_id and now - recent_attackers[aid] <= 10.0:
-						assist_ids.append(aid)
-				
-				if _source and _source is Node:
-					if _source.has_method("get_multiplayer_authority"):
-						killer_id = _source.get_multiplayer_authority()
-					elif "owner_player" in _source and _source.owner_player:
-						killer_id = int(str(_source.owner_player.name))
-					elif _source is PlayerMovementController:
-						killer_id = int(str(_source.name))
+			if is_multiplayer_authority():
+				if get_node_or_null("/root/NetworkManager") and multiplayer.has_multiplayer_peer():
+					var victim_id = multiplayer.get_unique_id()
+					var killer_id = attacker_id
 					
-					if _source.has_method("get_weapon_name"):
-						weapon_name = _source.get_weapon_name()
-				get_node("/root/NetworkManager").register_kill.rpc(victim_id, killer_id, weapon_name, "", assist_ids)
+					var assist_ids: Array = []
+					var now = Time.get_ticks_msec() / 1000.0
+					for aid in recent_attackers.keys():
+						if aid != killer_id and now - recent_attackers[aid] <= 10.0:
+							assist_ids.append(aid)
+					
+					get_node("/root/NetworkManager").register_kill.rpc(victim_id, killer_id, weapon_name, "", assist_ids)
 
 func get_weapon_name() -> String:
 	if camera:
@@ -391,6 +593,11 @@ func _physics_process(_delta: float) -> void:
 	if humanoid:
 		var h_speed = Vector2(velocity.x, velocity.z).length()
 		humanoid.update_state(sm.current_state, h_speed, sm.input_crouch)
+	
+	# Write synced state for remote peers
+	synced_movement_state = sm.current_state
+	synced_movement_speed = Vector2(velocity.x, velocity.z).length()
+	synced_is_crouching = sm.input_crouch
 
 
 func _on_movement_event(ev: String, data: Dictionary) -> void:
@@ -402,7 +609,22 @@ func _on_movement_event(ev: String, data: Dictionary) -> void:
 		grapple_latch_player.play()
 
 func _process(delta: float) -> void:
-	if not is_multiplayer_authority(): return
+	# Remote players: apply synced movement state to their HumanoidModel
+	if not is_multiplayer_authority():
+		if synced_loadout_ready and not has_meta("remote_weapons_built"):
+			set_meta("remote_weapons_built", true)
+			var wman = camera.get_node_or_null("WeaponManager")
+			if wman and wman.has_method("_build_remote_loadout"):
+				wman._build_remote_loadout(synced_loadout_p1, synced_loadout_p2, synced_loadout_sp, synced_loadout_melee)
+				
+		var humanoid = get_node_or_null("HumanoidModel")
+		if humanoid:
+			humanoid.update_state(synced_movement_state, synced_movement_speed, synced_is_crouching)
+			# Check for weapon changes
+			if synced_weapon_path != "" and synced_weapon_path != humanoid.get_meta("current_weapon_path", ""):
+				humanoid.set_weapon(synced_weapon_path)
+				humanoid.set_meta("current_weapon_path", synced_weapon_path)
+		return
 	if is_dead:
 		# Continuously follow the ragdoll torso
 		if is_instance_valid(ragdoll_instance) and is_instance_valid(camera):
@@ -538,7 +760,8 @@ func _setup_hud() -> void:
 	tw.tween_property(respawn_label, "modulate:a", 0.2, 0.8)
 	tw.tween_property(respawn_label, "modulate:a", 1.0, 0.8)
 	
-	_damage_layer.add_child(death_screen)
+	if is_multiplayer_authority():
+		_damage_layer.add_child(death_screen)
 
 func die(impulse: Vector3 = Vector3.ZERO) -> void:
 	if is_dead: return
@@ -630,8 +853,9 @@ func die(impulse: Vector3 = Vector3.ZERO) -> void:
 		ragdoll_instance.set_meta("spring_arm", spring_arm)
 	
 	# Show death screen
-	death_screen.visible = true
-	set_process_input(true)
+	if is_multiplayer_authority():
+		death_screen.visible = true
+		set_process_input(true)
 
 func _input(event: InputEvent) -> void:
 	if not is_multiplayer_authority(): return
@@ -641,5 +865,60 @@ func _input(event: InputEvent) -> void:
 				_on_respawn_pressed()
 
 func _on_respawn_pressed() -> void:
-	# Reload scene
-	get_tree().reload_current_scene()
+	var spawn_pos = Vector3(randf_range(-5, 5), 5, randf_range(-5, 5))
+	if not multiplayer.has_multiplayer_peer() or multiplayer.multiplayer_peer is OfflineMultiplayerPeer:
+		rpc_respawn(spawn_pos)
+	else:
+		rpc_respawn.rpc(spawn_pos)
+
+@rpc("any_peer", "call_local", "reliable")
+func rpc_respawn(spawn_pos: Vector3) -> void:
+	is_dead = false
+	health = max_health
+	shield = 0.0
+	
+	if is_instance_valid(ragdoll_instance):
+		if ragdoll_instance.has_meta("spring_arm"):
+			var sa = ragdoll_instance.get_meta("spring_arm")
+			if is_instance_valid(sa):
+				sa.queue_free()
+		ragdoll_instance.queue_free()
+		
+	# Restore camera parent
+	if is_instance_valid(camera) and is_instance_valid(head_pivot):
+		var p = camera.get_parent()
+		if p != head_pivot:
+			p.remove_child(camera)
+			head_pivot.add_child(camera)
+			camera.position = Vector3.ZERO
+			camera.rotation = Vector3.ZERO
+			
+	# Re-enable movement state machine
+	if _machine:
+		_machine.process_mode = Node.PROCESS_MODE_INHERIT
+		
+	# Re-enable collision
+	var col = get_node_or_null("CollisionShape3D")
+	if col:
+		col.set_deferred("disabled", false)
+		
+	var visual_model = get_node_or_null("HumanoidModel")
+	if visual_model:
+		visual_model.visible = true
+		
+	if is_multiplayer_authority():
+		if death_screen:
+			death_screen.visible = false
+		position = spawn_pos
+		velocity = Vector3.ZERO
+		
+		# Optional: reset weapons
+		var wman = camera.get_node_or_null("WeaponManager") if camera else null
+		if wman:
+			wman.visible = true
+			wman.process_mode = Node.PROCESS_MODE_INHERIT
+			var cv = wman.get("canvas_layer")
+			if cv:
+				cv.visible = true
+			if wman.has_method("_build_loadout"):
+				wman._build_loadout()

weapons/base_hitscan_weapon.gd

@@ -161,7 +161,12 @@ func _shoot_hitscan() -> void:
 		hits_remaining -= 1
 		current_damage_mult *= penetration_damage_penalty
 		final_target = result.position
+	_spawn_tracer(origin, final_target)
+	
+	if multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer is not OfflineMultiplayerPeer:
+		player.server_play_fire_effects.rpc_id(1, origin, final_target, name, true)
 
+func _spawn_tracer(_origin: Vector3, final_target: Vector3) -> void:
 	# Spawn cosmetic tracer
 	var tracer = Node3D.new()
 	tracer.set_script(load("res://weapons/hitscan_tracer.gd"))

weapons/base_projectile_weapon.gd

@@ -120,6 +120,9 @@ func _shoot_projectile() -> void:
 	var fire_dir = (forward + offset_dir).normalized()
 	
 	_spawn_custom_projectile(origin, fire_dir)
+	
+	if multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer is not OfflineMultiplayerPeer:
+		player.server_play_fire_effects.rpc_id(1, origin, fire_dir, weapon_name, false)
 
 func _spawn_custom_projectile(_origin: Vector3, _fire_dir: Vector3) -> void:
 	# Virtual method for custom projectiles (e.g., bouncing, homing)

weapons/explosive_projectile.gd

@@ -137,6 +137,8 @@ func _on_hit(result: Dictionary) -> void:
 	if not result.collider.has_method("take_damage"):
 		if result.collider is StaticBody3D or result.collider is CSGShape3D:
 			ImpactSpawner.spawn(get_tree(), "crater", result.position, result.normal, explosion_radius * 1.5)
+	elif not owner_player or owner_player.is_multiplayer_authority():
+		result.collider.take_damage(damage, result.position, owner_player)
 	_explode(result.position)
 	destroy()
 
@@ -198,10 +200,14 @@ func _explode(pos: Vector3) -> void:
 			if col == owner_player and not can_self_damage:
 				# Skip self damage, but we still applied the knockback!
 				pass
-			else:
-				col.take_damage(final_damage, target_pos, owner_player)
+			elif not owner_player or owner_player.is_multiplayer_authority():
+				col.take_damage(final_damage, target_pos, owner_player, dir * final_knockback)
 				
-	# Visual Effect
+	# Broadcast Visual Explosion Effect to other peers
+	if owner_player and owner_player.has_method("server_play_explosion") and owner_player.multiplayer.has_multiplayer_peer() and owner_player.multiplayer.multiplayer_peer is not OfflineMultiplayerPeer:
+		owner_player.server_play_explosion.rpc_id(1, pos, explosion_radius)
+		
+	# Local Visual Effect
 	var visual = MeshInstance3D.new()
 	var s_mesh = SphereMesh.new()
 	s_mesh.radius = explosion_radius

weapons/projectile.gd

@@ -58,7 +58,8 @@ func _on_hit(result: Dictionary) -> void:
 		final_damage = lerpf(damage, min_damage, falloff_factor)
 		
 	if result.collider.has_method("take_damage"):
-		result.collider.take_damage(final_damage, result.position, owner_player)
+		if not owner_player or owner_player.is_multiplayer_authority():
+			result.collider.take_damage(final_damage, result.position, owner_player)
 	elif result.collider is StaticBody3D or result.collider is CSGShape3D:
 		var size = 0.4 if impact_type == "plasma" else 0.15
 		ImpactSpawner.spawn(get_tree(), impact_type, result.position, result.normal, size)

weapons/rocket_swarm.gd

@@ -140,6 +140,9 @@ func _fire() -> void:
 		
 		var fire_dir = (base_dir + right * x_dir + up * y_dir).normalized()
 		_spawn_custom_projectile(proj_origin, fire_dir)
+		
+		if multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer is not OfflineMultiplayerPeer:
+			player.server_play_fire_effects.rpc_id(1, proj_origin, fire_dir, weapon_name, false)
 
 var _current_aim_dir: Vector3 = Vector3.ZERO
 

weapons/weapon_manager.gd

@@ -61,6 +61,15 @@ func _process(_delta: float) -> void:
 		vm_camera.fov = camera.fov
 
 func _build_loadout() -> void:
+	var is_auth = false
+	if player:
+		is_auth = player.is_multiplayer_authority()
+	else:
+		is_auth = is_multiplayer_authority()
+		
+	if not is_auth:
+		return # Let the player_movement_controller's remote _process call _build_remote_loadout
+		
 	# Clear existing weapons
 	for w in weapons.values():
 		if is_instance_valid(w):
@@ -69,6 +78,16 @@ func _build_loadout() -> void:
 	
 	var l = LoadoutManager.get_active_loadout()
 	
+	if player:
+		player.synced_loadout_p1 = l["primary_1"]
+		player.synced_loadout_p2 = l["primary_2"]
+		player.synced_loadout_sp = l["special"]
+		if l.has("melee"):
+			player.synced_loadout_melee = l["melee"]
+		else:
+			player.synced_loadout_melee = ""
+		player.synced_loadout_ready = true
+	
 	_spawn_weapon(1, l["primary_1"])
 	_spawn_weapon(2, l["primary_2"])
 	_spawn_weapon(3, l["special"])
@@ -77,6 +96,20 @@ func _build_loadout() -> void:
 	
 	_equip_slot(1)
 
+func _build_remote_loadout(p1: String, p2: String, sp: String, melee: String) -> void:
+	for w in weapons.values():
+		if is_instance_valid(w):
+			w.queue_free()
+	weapons.clear()
+	
+	_spawn_weapon(1, p1)
+	_spawn_weapon(2, p2)
+	_spawn_weapon(3, sp)
+	if melee != "":
+		_spawn_weapon(4, melee)
+	
+	_equip_slot(1)
+
 func _spawn_weapon(slot: int, weapon_id: String) -> void:
 	if weapon_id == "" or weapon_id == "none" or not LoadoutManager.weapon_db.has(weapon_id):
 		return
@@ -184,6 +217,9 @@ func _equip_slot(slot: int) -> void:
 			var humanoid = player.get_node("HumanoidModel")
 			if humanoid.has_method("set_weapon") and w.has_meta("script_path"):
 				humanoid.set_weapon(w.get_meta("script_path"))
+				# Update the synced variable so remote peers pick it up
+				if "synced_weapon_path" in player:
+					player.synced_weapon_path = w.get_meta("script_path")
 	
 func _input(event: InputEvent) -> void:
 	if Input.get_mouse_mode() != Input.MOUSE_MODE_CAPTURED: