diff --git a/assets/cubyz/ui/hud/energy.png b/assets/cubyz/ui/hud/energy.png
new file mode 100644
index 00000000..360ecfbf
Binary files /dev/null and b/assets/cubyz/ui/hud/energy.png differ
diff --git a/assets/cubyz/ui/hud/half_energy.png b/assets/cubyz/ui/hud/half_energy.png
new file mode 100644
index 00000000..69de9679
Binary files /dev/null and b/assets/cubyz/ui/hud/half_energy.png differ
diff --git a/assets/cubyz/ui/hud/no_energy.png b/assets/cubyz/ui/hud/no_energy.png
new file mode 100644
index 00000000..76767ee0
Binary files /dev/null and b/assets/cubyz/ui/hud/no_energy.png differ
diff --git a/src/Inventory.zig b/src/Inventory.zig
index b8f84ac8..a54844c3 100644
--- a/src/Inventory.zig
+++ b/src/Inventory.zig
@@ -486,6 +486,7 @@ pub const Command = struct { // MARK: Command
 		create = 3,
 		useDurability = 4,
 		addHealth = 5,
+		addEnergy = 6,
 	};
 
 	const InventoryAndSlot = struct {
@@ -542,6 +543,11 @@ pub const Command = struct { // MARK: Command
 			cause: main.game.DamageType,
 			previous: f32,
 		},
+		addEnergy: struct {
+			target: ?*main.server.User,
+			energy: f32,
+			previous: f32,
+		},
 	};
 
 	const SyncOperationType = enum(u8) {
@@ -550,6 +556,7 @@ pub const Command = struct { // MARK: Command
 		useDurability = 2,
 		health = 3,
 		kill = 4,
+		energy = 5,
 	};
 
 	const SyncOperation = union(SyncOperationType) { // MARK: SyncOperation
@@ -574,6 +581,10 @@ pub const Command = struct { // MARK: Command
 		kill: struct {
 			target: ?*main.server.User,
 		},
+		energy: struct {
+			target: ?*main.server.User,
+			energy: f32,
+		},
 
 		pub fn executeFromData(reader: *utils.BinaryReader) !void {
 			switch(try deserialize(reader)) {
@@ -617,6 +628,9 @@ pub const Command = struct { // MARK: Command
 				.kill => {
 					main.game.Player.kill();
 				},
+				.energy => |energy| {
+					main.game.Player.super.energy = std.math.clamp(main.game.Player.super.energy + energy.energy, 0, main.game.Player.super.maxEnergy);
+				},
 			}
 		}
 
@@ -625,7 +639,7 @@ pub const Command = struct { // MARK: Command
 				inline .create, .delete, .useDurability => |data| {
 					return allocator.dupe(*main.server.User, Sync.ServerSide.inventories.items[data.inv.inv.id].users.items);
 				},
-				inline .health, .kill => |data| {
+				inline .health, .kill, .energy => |data| {
 					const out = allocator.alloc(*main.server.User, 1);
 					out[0] = data.target.?;
 					return out;
@@ -635,7 +649,7 @@ pub const Command = struct { // MARK: Command
 
 		pub fn ignoreSource(self: SyncOperation) bool {
 			return switch(self) {
-				.create, .delete, .useDurability, .health => true,
+				.create, .delete, .useDurability, .health, .energy => true,
 				.kill => false,
 			};
 		}
@@ -686,6 +700,12 @@ pub const Command = struct { // MARK: Command
 						.target = null,
 					}};
 				},
+				.energy => {
+					return .{.energy = .{
+						.target = null,
+						.energy = @bitCast(try reader.readInt(u32)),
+					}};
+				},
 			}
 		}
 
@@ -717,6 +737,9 @@ pub const Command = struct { // MARK: Command
 					writer.writeInt(u32, @bitCast(health.health));
 				},
 				.kill => {},
+				.energy => |energy| {
+					writer.writeInt(u32, @bitCast(energy.energy));
+				},
 			}
 			return writer.data.toOwnedSlice();
 		}
@@ -793,6 +816,9 @@ pub const Command = struct { // MARK: Command
 				.addHealth => |info| {
 					main.game.Player.super.health = info.previous;
 				},
+				.addEnergy => |info| {
+					main.game.Player.super.energy = info.previous;
+				},
 			}
 		}
 	}
@@ -800,7 +826,7 @@ pub const Command = struct { // MARK: Command
 	fn finalize(self: Command, allocator: NeverFailingAllocator, side: Side, reader: *utils.BinaryReader) !void {
 		for(self.baseOperations.items) |step| {
 			switch(step) {
-				.move, .swap, .create, .addHealth => {},
+				.move, .swap, .create, .addHealth, .addEnergy => {},
 				.delete => |info| {
 					info.item.?.deinit();
 				},
@@ -941,6 +967,20 @@ pub const Command = struct { // MARK: Command
 					main.game.Player.super.health = std.math.clamp(main.game.Player.super.health + info.health, 0, main.game.Player.super.maxHealth);
 				}
 			},
+			.addEnergy => |*info| {
+				if(side == .server) {
+					info.previous = info.target.?.player.energy;
+
+					info.target.?.player.energy = std.math.clamp(info.target.?.player.energy + info.energy, 0, info.target.?.player.maxEnergy);
+					self.syncOperations.append(allocator, .{.energy = .{
+						.target = info.target.?,
+						.energy = info.energy,
+					}});
+				} else {
+					info.previous = main.game.Player.super.energy;
+					main.game.Player.super.energy = std.math.clamp(main.game.Player.super.energy + info.energy, 0, main.game.Player.super.maxEnergy);
+				}
+			},
 		}
 		self.baseOperations.append(allocator, op);
 	}
diff --git a/src/game.zig b/src/game.zig
index 16ed353e..c36ac3fe 100644
--- a/src/game.zig
+++ b/src/game.zig
@@ -584,6 +584,7 @@ pub const Player = struct { // MARK: Player
 		Player.super.vel = .{0, 0, 0};
 
 		Player.super.health = Player.super.maxHealth;
+		Player.super.energy = Player.super.maxEnergy;
 
 		Player.eyePos = .{0, 0, 0};
 		Player.eyeVel = .{0, 0, 0};
diff --git a/src/gui/windows/_windowlist.zig b/src/gui/windows/_windowlist.zig
index 96c634d3..e341da7b 100644
--- a/src/gui/windows/_windowlist.zig
+++ b/src/gui/windows/_windowlist.zig
@@ -9,6 +9,7 @@ pub const debug_network_advanced = @import("debug_network_advanced.zig");
 pub const debug = @import("debug.zig");
 pub const delete_world_confirmation = @import("delete_world_confirmation.zig");
 pub const download_controller_mappings = @import("download_controller_mappings.zig");
+pub const energybar = @import("energybar.zig");
 pub const error_prompt = @import("error_prompt.zig");
 pub const gpu_performance_measuring = @import("gpu_performance_measuring.zig");
 pub const graphics = @import("graphics.zig");
diff --git a/src/gui/windows/energybar.zig b/src/gui/windows/energybar.zig
new file mode 100644
index 00000000..526d1c7e
--- /dev/null
+++ b/src/gui/windows/energybar.zig
@@ -0,0 +1,70 @@
+const std = @import("std");
+
+const main = @import("root");
+const graphics = main.graphics;
+const draw = graphics.draw;
+const Texture = graphics.Texture;
+const Vec2f = main.vec.Vec2f;
+
+const gui = @import("../gui.zig");
+const GuiWindow = gui.GuiWindow;
+const GuiComponent = gui.GuiComponent;
+
+const hotbar = @import("hotbar.zig");
+
+pub var window = GuiWindow{
+	.scale = 0.5,
+	.relativePosition = .{
+		.{.attachedToWindow = .{.reference = &hotbar.window, .selfAttachmentPoint = .lower, .otherAttachmentPoint = .lower}},
+		.{.attachedToWindow = .{.reference = &hotbar.window, .selfAttachmentPoint = .upper, .otherAttachmentPoint = .lower}},
+	},
+	.contentSize = Vec2f{160, 20},
+	.isHud = true,
+	.showTitleBar = false,
+	.hasBackground = false,
+	.hideIfMouseIsGrabbed = false,
+	.closeable = false,
+};
+
+var energyTexture: Texture = undefined;
+var halfEnergyTexture: Texture = undefined;
+var noEnergyTexture: Texture = undefined;
+
+pub fn init() void {
+	energyTexture = Texture.initFromFile("assets/cubyz/ui/hud/energy.png");
+	halfEnergyTexture = Texture.initFromFile("assets/cubyz/ui/hud/half_energy.png");
+	noEnergyTexture = Texture.initFromFile("assets/cubyz/ui/hud/no_energy.png");
+}
+
+pub fn deinit() void {
+	energyTexture.deinit();
+	halfEnergyTexture.deinit();
+	noEnergyTexture.deinit();
+}
+
+pub fn render() void {
+	draw.setColor(0xffffffff);
+	var y: f32 = 0;
+	var x: f32 = 0;
+	var energy: f32 = 0;
+	while(energy < main.game.Player.super.maxEnergy) : (energy += 1) {
+		if(x >= window.contentSize[0]) {
+			x = 0;
+			y += 20;
+		}
+		if(energy + 1 <= main.game.Player.super.energy) {
+			energyTexture.bindTo(0);
+		} else if(energy + 0.5 <= main.game.Player.super.energy) {
+			halfEnergyTexture.bindTo(0);
+		} else {
+			noEnergyTexture.bindTo(0);
+		}
+		draw.boundImage(Vec2f{x, window.contentSize[1] - y - 20}, .{20, 20});
+		x += 20;
+	}
+	y += 20;
+	if(y != window.contentSize[1]) {
+		window.contentSize[1] = y;
+		gui.updateWindowPositions();
+	}
+}
diff --git a/src/server/Entity.zig b/src/server/Entity.zig
index 0f7c2a66..5f0cac30 100644
--- a/src/server/Entity.zig
+++ b/src/server/Entity.zig
@@ -13,7 +13,8 @@ rot: Vec3f = .{0, 0, 0},
 
 health: f32 = 8,
 maxHealth: f32 = 8,
-// TODO: Hunger
+energy: f32 = 8,
+maxEnergy: f32 = 8,
 // TODO: Name
 
 pub fn loadFrom(self: *@This(), zon: ZonElement) void {
@@ -21,6 +22,7 @@ pub fn loadFrom(self: *@This(), zon: ZonElement) void {
 	self.vel = zon.get(Vec3d, "velocity", .{0, 0, 0});
 	self.rot = zon.get(Vec3f, "rotation", .{0, 0, 0});
 	self.health = zon.get(f32, "health", self.maxHealth);
+	self.energy = zon.get(f32, "energy", self.maxEnergy);
 }
 
 pub fn save(self: *@This(), allocator: NeverFailingAllocator) ZonElement {
@@ -29,5 +31,6 @@ pub fn save(self: *@This(), allocator: NeverFailingAllocator) ZonElement {
 	zon.put("velocity", self.vel);
 	zon.put("rotation", self.rot);
 	zon.put("health", self.health);
+	zon.put("energy", self.energy);
 	return zon;
 }