diff --git a/project.godot b/project.godot
index 40cc3ee..e66d5b0 100644
--- a/project.godot
+++ b/project.godot
@@ -100,6 +100,7 @@ ItemDatabase="*res://scripts/inventory/ItemDatabase.gd"
 NetworkManager="*res://scripts/net/NetworkManager.gd"
 PlayerProgress="*res://scripts/progression/PlayerProgress.gd"
 QuestManager="*res://scripts/progression/QuestManager.gd"
+AchievementManager="*res://scripts/progression/AchievementManager.gd"
 
 [rendering]
 environment/defaults/default_clear_color=Color(0.05, 0.15, 0.25, 1)
diff --git a/scripts/Main.gd b/scripts/Main.gd
index 2f7f4a3..58577bb 100644
--- a/scripts/Main.gd
+++ b/scripts/Main.gd
@@ -251,6 +251,9 @@ func _award_break_xp(block_id: int, hit_position: Vector3) -> void:
 	var qm: Node = get_node_or_null("/root/QuestManager")
 	if qm != null:
 		qm.note_block_break(block_id)
+	var am: Node = get_node_or_null("/root/AchievementManager")
+	if am != null:
+		am.note_block_break(block_id)
 
 
 func _spawn_xp_popup(amount: int, world_pos: Vector3) -> void:
@@ -289,6 +292,9 @@ func _on_block_place(hit_position: Vector3, normal: Vector3) -> void:
 
 func _on_echolocation(position: Vector3, _radius: float) -> void:
 	AudioManager.play_bubble_sfx(position)
+	var am: Node = get_node_or_null("/root/AchievementManager")
+	if am != null:
+		am.note_echolocation()
 
 
 # Called by WorldSyncComponent when server confirms a block was broken by this client
diff --git a/scripts/dolphin/HUD.gd b/scripts/dolphin/HUD.gd
index 02724de..9805fb0 100644
--- a/scripts/dolphin/HUD.gd
+++ b/scripts/dolphin/HUD.gd
@@ -25,6 +25,9 @@ var _quest_list: VBoxContainer = null
 var _quest_complete_banner: Label = null
 var _quest_banner_timer: float = 0.0
 
+var _toast_container: VBoxContainer = null
+var _toasts: Array = []  # each: {"node": PanelContainer, "timer": float}
+
 var _biome_cache_pos: Vector3 = Vector3(99999, 99999, 99999)
 var _biome_cached_name: String = ""
 
@@ -48,6 +51,10 @@ func _ready() -> void:
 		qm.quests_updated.connect(_on_quests_updated)
 		qm.quest_completed.connect(_on_quest_completed)
 		_on_quests_updated()
+	_build_toast_container()
+	var am: Node = get_node_or_null("/root/AchievementManager")
+	if am != null:
+		am.achievement_unlocked.connect(_on_achievement_unlocked)
 
 
 func _build_info_panel() -> void:
@@ -232,6 +239,91 @@ func _on_quest_completed(q: Dictionary) -> void:
 			am.call("play_bubble_sfx", _dolphin.global_position)
 
 
+func _build_toast_container() -> void:
+	_toast_container = VBoxContainer.new()
+	_toast_container.anchor_left = 0.5
+	_toast_container.anchor_right = 0.5
+	_toast_container.anchor_top = 0.0
+	_toast_container.anchor_bottom = 0.0
+	_toast_container.offset_left = -220.0
+	_toast_container.offset_right = 220.0
+	_toast_container.offset_top = 16.0
+	_toast_container.offset_bottom = 16.0
+	_toast_container.add_theme_constant_override("separation", 6)
+	add_child(_toast_container)
+
+
+func _on_achievement_unlocked(ach: Dictionary) -> void:
+	if _toast_container == null:
+		return
+	var panel := PanelContainer.new()
+	var style := StyleBoxFlat.new()
+	style.bg_color = Color(0.18, 0.14, 0.05, 0.92)
+	style.border_color = Color(1.0, 0.82, 0.2)
+	style.set_border_width_all(2)
+	style.set_corner_radius_all(8)
+	panel.add_theme_stylebox_override("panel", style)
+
+	var hbox := HBoxContainer.new()
+	hbox.add_theme_constant_override("separation", 10)
+	panel.add_child(hbox)
+
+	var icon := Label.new()
+	icon.text = ach.get("icon", "★")
+	icon.add_theme_font_size_override("font_size", 28)
+	icon.add_theme_color_override("font_color", Color(1.0, 0.92, 0.4))
+	hbox.add_child(icon)
+
+	var vbox := VBoxContainer.new()
+	vbox.add_theme_constant_override("separation", 0)
+	hbox.add_child(vbox)
+
+	var title := Label.new()
+	title.text = "SUCCÈS DÉBLOQUÉ : %s" % ach["name"]
+	title.add_theme_font_size_override("font_size", 13)
+	title.add_theme_color_override("font_color", Color(1.0, 0.95, 0.6))
+	vbox.add_child(title)
+
+	var desc := Label.new()
+	desc.text = "%s  (+%d XP)" % [ach["desc"], ach["xp"]]
+	desc.add_theme_font_size_override("font_size", 11)
+	desc.add_theme_color_override("font_color", Color(0.88, 0.88, 0.88))
+	vbox.add_child(desc)
+
+	_toast_container.add_child(panel)
+	panel.modulate.a = 0.0
+	_toasts.append({"node": panel, "timer": 4.0, "age": 0.0})
+
+	var audio: Node = get_node_or_null("/root/AudioManager")
+	if audio != null and is_instance_valid(_dolphin) and audio.has_method("play_bubble_sfx"):
+		audio.call("play_bubble_sfx", _dolphin.global_position)
+
+
+func _update_toasts(delta: float) -> void:
+	if _toasts.is_empty():
+		return
+	var i: int = _toasts.size() - 1
+	while i >= 0:
+		var t: Dictionary = _toasts[i]
+		t["age"] += delta
+		t["timer"] -= delta
+		var node: PanelContainer = t["node"]
+		if not is_instance_valid(node):
+			_toasts.remove_at(i)
+			i -= 1
+			continue
+		if t["age"] < 0.35:
+			node.modulate.a = t["age"] / 0.35
+		elif t["timer"] < 0.5:
+			node.modulate.a = maxf(t["timer"] / 0.5, 0.0)
+		else:
+			node.modulate.a = 1.0
+		if t["timer"] <= 0.0:
+			node.queue_free()
+			_toasts.remove_at(i)
+		i -= 1
+
+
 func _build_level_banner() -> void:
 	_level_banner = Label.new()
 	_level_banner.anchor_left = 0.5
@@ -320,6 +412,8 @@ func _process(delta: float) -> void:
 		if _quest_complete_banner != null:
 			_quest_complete_banner.modulate.a = clampf(_quest_banner_timer / 0.6, 0.0, 1.0)
 
+	_update_toasts(delta)
+
 	if not is_instance_valid(_dolphin):
 		return
 
@@ -334,6 +428,9 @@ func _process(delta: float) -> void:
 		var qm: Node = get_node_or_null("/root/QuestManager")
 		if qm != null and qm.has_method("note_depth"):
 			qm.call("note_depth", depth_m)
+		var am2: Node = get_node_or_null("/root/AchievementManager")
+		if am2 != null and am2.has_method("note_depth"):
+			am2.call("note_depth", depth_m)
 
 	if _compass_label != null:
 		_compass_label.text = _compass_text(_dolphin.rotation.y)
diff --git a/scripts/inventory/CraftingRecipes.gd b/scripts/inventory/CraftingRecipes.gd
index ac0e1f4..2e6e48b 100644
--- a/scripts/inventory/CraftingRecipes.gd
+++ b/scripts/inventory/CraftingRecipes.gd
@@ -64,3 +64,6 @@ static func _award_craft_xp(recipe: Dictionary) -> void:
 	var qm: Node = root.get_node_or_null("/root/QuestManager")
 	if qm != null:
 		qm.note_craft()
+	var ach: Node = root.get_node_or_null("/root/AchievementManager")
+	if ach != null:
+		ach.note_craft()
diff --git a/scripts/progression/AchievementManager.gd b/scripts/progression/AchievementManager.gd
new file mode 100644
index 0000000..e2571c0
--- /dev/null
+++ b/scripts/progression/AchievementManager.gd
@@ -0,0 +1,91 @@
+extends Node
+
+signal achievement_unlocked(ach: Dictionary)
+
+const ACHIEVEMENTS: Array = [
+	{"id": "first_break", "name": "Premier éclat", "desc": "Casser ton premier bloc", "xp": 10, "icon": "⛏"},
+	{"id": "ten_breaks", "name": "Mineur apprenti", "desc": "Casser 10 blocs", "xp": 20, "icon": "⛏"},
+	{"id": "hundred_breaks", "name": "Mineur confirmé", "desc": "Casser 100 blocs", "xp": 80, "icon": "⛏"},
+	{"id": "first_pearl", "name": "Lueur nacrée", "desc": "Collecter ta première perle", "xp": 20, "icon": "◉"},
+	{"id": "ten_pearls", "name": "Chasseur de perles", "desc": "Collecter 10 perles", "xp": 120, "icon": "◉"},
+	{"id": "first_craft", "name": "Artisan", "desc": "Crafter ton premier objet", "xp": 15, "icon": "✦"},
+	{"id": "first_wreck", "name": "Fouilleur d'épaves", "desc": "Piller une épave", "xp": 30, "icon": "⚓"},
+	{"id": "depth_50", "name": "Plongée profonde", "desc": "Atteindre -50 m", "xp": 60, "icon": "▼"},
+	{"id": "depth_100", "name": "Abysses", "desc": "Atteindre -100 m", "xp": 200, "icon": "▼"},
+	{"id": "level_5", "name": "Dauphin aguerri", "desc": "Atteindre le niveau 5", "xp": 50, "icon": "★"},
+	{"id": "level_10", "name": "Légende des océans", "desc": "Atteindre le niveau 10", "xp": 150, "icon": "★"},
+	{"id": "echo_first", "name": "Sonar aiguisé", "desc": "Utiliser l'écholocation", "xp": 10, "icon": "))"},
+]
+
+var unlocked: Dictionary = {}  # id -> true
+
+var _break_count: int = 0
+var _pearl_count: int = 0
+
+
+func _ready() -> void:
+	var pp: Node = get_node_or_null("/root/PlayerProgress")
+	if pp != null:
+		pp.level_up.connect(_on_level_up)
+
+
+func note_block_break(block_id: int) -> void:
+	_break_count += 1
+	if _break_count >= 1:
+		_unlock("first_break")
+	if _break_count >= 10:
+		_unlock("ten_breaks")
+	if _break_count >= 100:
+		_unlock("hundred_breaks")
+	if block_id == 7:
+		_unlock("first_wreck")
+
+
+func note_pearl_collected() -> void:
+	_pearl_count += 1
+	if _pearl_count >= 1:
+		_unlock("first_pearl")
+	if _pearl_count >= 10:
+		_unlock("ten_pearls")
+
+
+func note_craft() -> void:
+	_unlock("first_craft")
+
+
+func note_depth(depth_m: int) -> void:
+	if depth_m >= 50:
+		_unlock("depth_50")
+	if depth_m >= 100:
+		_unlock("depth_100")
+
+
+func note_echolocation() -> void:
+	_unlock("echo_first")
+
+
+func _on_level_up(new_level: int) -> void:
+	if new_level >= 5:
+		_unlock("level_5")
+	if new_level >= 10:
+		_unlock("level_10")
+
+
+func _unlock(id: String) -> void:
+	if unlocked.has(id):
+		return
+	var ach: Dictionary = _find(id)
+	if ach.is_empty():
+		return
+	unlocked[id] = true
+	achievement_unlocked.emit(ach)
+	var pp: Node = get_node_or_null("/root/PlayerProgress")
+	if pp != null:
+		pp.award(ach["xp"], "succès: %s" % ach["name"], Vector3.ZERO)
+
+
+func _find(id: String) -> Dictionary:
+	for a: Dictionary in ACHIEVEMENTS:
+		if a["id"] == id:
+			return a
+	return {}
diff --git a/scripts/world/PearlSpawner.gd b/scripts/world/PearlSpawner.gd
index dd4336d..1da19c9 100644
--- a/scripts/world/PearlSpawner.gd
+++ b/scripts/world/PearlSpawner.gd
@@ -125,3 +125,6 @@ func _on_pearl_collected(item_id: int) -> void:
 	var qm: Node = get_node_or_null("/root/QuestManager")
 	if qm != null:
 		qm.note_pearl_collected()
+	var ach: Node = get_node_or_null("/root/AchievementManager")
+	if ach != null:
+		ach.note_pearl_collected()