diff --git a/project.godot b/project.godot
index 022c1d2..de9d5b0 100644
--- a/project.godot
+++ b/project.godot
@@ -12,6 +12,7 @@ config_version=5
 
 config/name="GFOLF 2"
 config/description="GFOLF: Combat Golf Action"
+config/version="0.0.0"
 run/main_scene="res://src/game/game.tscn"
 config/project_settings_override="user://settings.godot"
 config/features=PackedStringArray("4.3", "Forward Plus")
diff --git a/src/game/game.tscn b/src/game/game.tscn
index 5340ea8..011d726 100644
--- a/src/game/game.tscn
+++ b/src/game/game.tscn
@@ -1,10 +1,11 @@
-[gd_scene load_steps=10 format=3 uid="uid://cefit4bc8akbb"]
+[gd_scene load_steps=11 format=3 uid="uid://cefit4bc8akbb"]
 
 [ext_resource type="Script" path="res://src/game/game.gd" id="1_4qa87"]
 [ext_resource type="FontFile" uid="uid://dsa0oh7c0h4pu" path="res://assets/fonts/Racing_Sans_One/RacingSansOne-Regular.ttf" id="2_y3adf"]
 [ext_resource type="Script" path="res://src/ui/decorations/rumbler.gd" id="3_3vfdb"]
 [ext_resource type="Script" path="res://src/ui/game_viewport_container.gd" id="3_rmm5i"]
 [ext_resource type="Script" path="res://src/game/game_viewport.gd" id="5_v2qv5"]
+[ext_resource type="Script" path="res://src/util/debug_version_info.gd" id="6_42bd1"]
 
 [sub_resource type="Animation" id="Animation_c3dlb"]
 length = 0.001
@@ -161,6 +162,47 @@ libraries = {
 "": SubResource("AnimationLibrary_1s0w0")
 }
 
+[node name="DebugOverlay" type="Control" parent="RootControl"]
+z_index = 129
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2
+
+[node name="MarginContainer" type="MarginContainer" parent="RootControl/DebugOverlay"]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2
+theme_override_constants/margin_left = 16
+theme_override_constants/margin_top = 16
+theme_override_constants/margin_right = 16
+theme_override_constants/margin_bottom = 16
+
+[node name="BuildInfo" type="HBoxContainer" parent="RootControl/DebugOverlay/MarginContainer"]
+modulate = Color(1, 1, 1, 0.392157)
+layout_mode = 2
+size_flags_horizontal = 0
+size_flags_vertical = 0
+
+[node name="Label" type="Label" parent="RootControl/DebugOverlay/MarginContainer/BuildInfo"]
+layout_mode = 2
+theme_type_variation = &"DebugText"
+text = "PREVIEW BUILD -"
+
+[node name="DebugVersionInfo" type="Label" parent="RootControl/DebugOverlay/MarginContainer/BuildInfo"]
+unique_name_in_owner = true
+layout_mode = 2
+theme_type_variation = &"DebugText"
+text = "0.0.0"
+script = ExtResource("6_42bd1")
+
 [node name="Rumbler" type="Control" parent="RootControl"]
 unique_name_in_owner = true
 layout_mode = 1
diff --git a/src/game/game_settings.gd b/src/game/game_settings.gd
index 2314954..e87c83c 100644
--- a/src/game/game_settings.gd
+++ b/src/game/game_settings.gd
@@ -1,6 +1,8 @@
 class_name GameSettingsType extends Node
 ## Container for project settings, for quick runtime access.
 
+var version: String
+
 var settings_file: String
 var audio_bus_file: String
 
@@ -27,6 +29,8 @@ func _init() -> void:
 
 
 func _read_settings() -> void:
+	version = ProjectSettings.get_setting("application/config/version")
+
 	settings_file = ProjectSettings.get_setting("application/config/project_settings_override")
 	audio_bus_file = ProjectSettings.get_setting("game/audio/buses/override_bus_layout")
 
diff --git a/src/ui/main_theme.tres b/src/ui/main_theme.tres
index e4c4615..d4631fd 100644
--- a/src/ui/main_theme.tres
+++ b/src/ui/main_theme.tres
@@ -1,4 +1,4 @@
-[gd_resource type="Theme" load_steps=10 format=3 uid="uid://diodjft5u2cck"]
+[gd_resource type="Theme" load_steps=11 format=3 uid="uid://diodjft5u2cck"]
 
 [ext_resource type="FontFile" uid="uid://dsa0oh7c0h4pu" path="res://assets/fonts/Racing_Sans_One/RacingSansOne-Regular.ttf" id="1_3rv2b"]
 [ext_resource type="FontFile" uid="uid://comihs66wounx" path="res://assets/fonts/Dokdo/Dokdo-Regular.ttf" id="1_eha6a"]
@@ -41,6 +41,10 @@ corner_radius_bottom_right = 3
 corner_radius_bottom_left = 3
 corner_detail = 5
 
+[sub_resource type="SystemFont" id="SystemFont_3ttu2"]
+font_names = PackedStringArray("Monospace")
+generate_mipmaps = true
+
 [sub_resource type="StyleBoxFlat" id="StyleBoxFlat_ynsl8"]
 content_margin_left = 36.0
 content_margin_top = 8.0
@@ -103,6 +107,12 @@ DeathScreenLabel/base_type = &"RichTextLabel"
 DeathScreenLabel/colors/default_color = Color(0.611765, 0.133333, 0.133333, 1)
 DeathScreenLabel/colors/font_outline_color = Color(0, 0, 0, 1)
 DeathScreenLabel/fonts/normal_font = ExtResource("1_eha6a")
+DebugText/base_type = &"Label"
+DebugText/colors/font_color = Color(1, 1, 1, 1)
+DebugText/colors/font_outline_color = Color(0, 0, 0, 1)
+DebugText/constants/outline_size = 4
+DebugText/font_sizes/font_size = 12
+DebugText/fonts/font = SubResource("SystemFont_3ttu2")
 HeaderLarge/constants/outline_size = 8
 HeaderLarge/font_sizes/font_size = 28
 HeaderMedium/constants/outline_size = 6
diff --git a/src/util/debug_version_info.gd b/src/util/debug_version_info.gd
new file mode 100644
index 0000000..faac1e2
--- /dev/null
+++ b/src/util/debug_version_info.gd
@@ -0,0 +1,22 @@
+extends Label
+## Label showing debug info about the game version.
+
+## Branch info will not be printed on any of these branches.
+const IGNORED_BRANCHES := ["main"]
+
+
+func _ready() -> void:
+	# Fall back on baked version info
+	text = Game.settings.version
+
+	var output: Array[String] = []
+	var status := OS.execute("git", ["describe", "--always", "HEAD"], output)
+	if status == 0:
+		text = output[0].strip_edges()
+
+	output = []
+	status = OS.execute("git", ["branch", "--show-current"], output)
+	if status == 0:
+		var branch_name := output[0].strip_edges()
+		if branch_name and not branch_name in IGNORED_BRANCHES:
+			text += " (%s)" % branch_name