diff --git a/assets/audio/sfx/door_close.wav b/assets/audio/sfx/door_close.wav
new file mode 100644
index 0000000..38a583f
Binary files /dev/null and b/assets/audio/sfx/door_close.wav differ
diff --git a/assets/audio/sfx/enemy_shoot.wav b/assets/audio/sfx/enemy_shoot.wav
new file mode 100644
index 0000000..e92eb42
Binary files /dev/null and b/assets/audio/sfx/enemy_shoot.wav differ
diff --git a/assets/audio/sfx/room_clear.wav b/assets/audio/sfx/room_clear.wav
new file mode 100644
index 0000000..3445b91
Binary files /dev/null and b/assets/audio/sfx/room_clear.wav differ
diff --git a/scripts/autoload/audio_manager.gd b/scripts/autoload/audio_manager.gd
index 10d62a5..2f607a6 100644
--- a/scripts/autoload/audio_manager.gd
+++ b/scripts/autoload/audio_manager.gd
@@ -10,6 +10,8 @@ const POOL_SIZE := 8
 # Preloaded sound effects
 var _sounds: Dictionary = {
 	"enemy_hit": preload("res://assets/audio/sfx/enemy_hit.wav"),
+	"enemy_death": preload("res://assets/audio/sfx/enemy_death.wav"),
+	"enemy_shoot": preload("res://assets/audio/sfx/enemy_shoot.wav"),
 	"player_hit": preload("res://assets/audio/sfx/player_hit.wav"),
 	"player_shoot": preload("res://assets/audio/sfx/player_shoot.wav"),
 	"explosion": preload("res://assets/audio/sfx/explosion.wav"),
@@ -17,6 +19,9 @@ var _sounds: Dictionary = {
 	"item_pickup": preload("res://assets/audio/sfx/item_pickup.wav"),
 	"ui_click": preload("res://assets/audio/sfx/ui_click.wav"),
 	"ui_select": preload("res://assets/audio/sfx/ui_select.wav"),
+	"door_close": preload("res://assets/audio/sfx/door_close.wav"),
+	"room_clear": preload("res://assets/audio/sfx/room_clear.wav"),
+	"teleport": preload("res://assets/audio/sfx/teleport.wav"),
 }
 
 var _pool: Array[AudioStreamPlayer] = []
diff --git a/scripts/enemies/enemy_base.gd b/scripts/enemies/enemy_base.gd
index 200849f..35a59a0 100644
--- a/scripts/enemies/enemy_base.gd
+++ b/scripts/enemies/enemy_base.gd
@@ -91,6 +91,7 @@ func take_damage(amount: float) -> void:
 		_die()
 
 func _die() -> void:
+	AudioManager.play("enemy_death")
 	_spawn_drop()
 	queue_free()
 
diff --git a/scripts/enemies/hivemind.gd b/scripts/enemies/hivemind.gd
index 9c3a515..d9bcd0b 100644
--- a/scripts/enemies/hivemind.gd
+++ b/scripts/enemies/hivemind.gd
@@ -863,6 +863,7 @@ func take_damage(amount: float) -> void:
 
 	current_health -= amount
 	_flash_timer = 0.1
+	AudioManager.play("enemy_hit")
 	EventBus.boss_health_changed.emit(maxf(current_health, 0.0), max_health, "THE HIVEMIND")
 
 	if current_health <= 0.0:
@@ -907,6 +908,7 @@ func _tick_climax(delta: float) -> void:
 
 
 func _die() -> void:
+	AudioManager.play("enemy_death")
 	_clear_orbiters()
 	_end_beam()
 
diff --git a/scripts/enemies/relay.gd b/scripts/enemies/relay.gd
index f18dfe5..3b158f8 100644
--- a/scripts/enemies/relay.gd
+++ b/scripts/enemies/relay.gd
@@ -369,6 +369,7 @@ func take_damage(amount: float) -> void:
 		return
 
 	current_health -= amount
+	AudioManager.play("enemy_hit")
 	EventBus.boss_health_changed.emit(current_health, max_health, "THE RELAY")
 
 	if current_health <= 5.0 and _phase != Phase.CLIMAX:
@@ -412,6 +413,7 @@ func _tick_climax(delta: float) -> void:
 		_die()
 
 func _die() -> void:
+	AudioManager.play("enemy_death")
 	EventBus.boss_died.emit()
 
 	# Cleanup burst projectiles
diff --git a/scripts/enemies/repeater.gd b/scripts/enemies/repeater.gd
index 5444a76..503dbf5 100644
--- a/scripts/enemies/repeater.gd
+++ b/scripts/enemies/repeater.gd
@@ -86,6 +86,7 @@ func _do_fire(delta: float) -> void:
 		_shot_timer = BURST_PAUSE
 
 func _fire_projectile() -> void:
+	AudioManager.play("enemy_shoot")
 	var proj = ENEMY_PROJECTILE.instantiate()
 	proj.position  = (get_parent() as Node2D).to_local(global_position)
 	proj.direction = Vector2.from_angle(_fire_angle)
diff --git a/scripts/enemies/warden.gd b/scripts/enemies/warden.gd
index 8cccc03..6042027 100644
--- a/scripts/enemies/warden.gd
+++ b/scripts/enemies/warden.gd
@@ -370,12 +370,14 @@ func take_damage(amount: float) -> void:
 		return   # already dying
 	current_health -= amount
 	_flash_timer    = 0.1
+	AudioManager.play("enemy_hit")
 	EventBus.boss_health_changed.emit(maxf(current_health, 0.0), max_health, "THE WARDEN")
 	if current_health <= 0.0:
 		_enter_climax()
 
 
 func _die() -> void:
+	AudioManager.play("enemy_death")
 	_clear_mines()
 	for entry in _sweep_projs:
 		if is_instance_valid(entry["node"]):
diff --git a/scripts/rooms/room.gd b/scripts/rooms/room.gd
index cc60a10..bb0c7cf 100644
--- a/scripts/rooms/room.gd
+++ b/scripts/rooms/room.gd
@@ -327,6 +327,7 @@ func _on_enemy_died() -> void:
 	_enemy_count -= 1
 	if _enemy_count <= 0:
 		data.cleared = true
+		AudioManager.play("room_clear")
 		if data.type == RoomData.RoomType.BOSS:
 			_spawn_body_part_drop()
 			_spawn_floor_exit()
@@ -566,11 +567,18 @@ func _update_door_locks() -> void:
 		(area as Area2D).monitoring = not locked
 
 	# Update physical door barriers
+	var was_unlocked := false
+	for door in _physical_doors.values():
+		if not door.is_locked():
+			was_unlocked = true
+			break
 	for door in _physical_doors.values():
 		if locked:
 			door.lock()
 		else:
 			door.unlock()
+	if locked and was_unlocked:
+		AudioManager.play("door_close")
 
 # ---------------------------------------------------------------------------
 # Explicit signal cleanup on exit (safer than relying on Godot auto-cleanup)