diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2b44c72
--- /dev/null
+++ b/README.md
@@ -0,0 +1,17 @@
+Minetest Defense [minetest_defense]
+===================================
+
+To use this game with Minetest, insert this repository as
+  /games/minetest_defense
+in the Minetest Engine.
+
+The Minetest Engine can be found in:
+  https://github.com/minetest/minetest/
+
+Compatibility
+--------------
+Minetest Defense is based on minetest_game 0.4.11, and should be compatible with Minetest 0.4.11.
+
+License
+-------
+Most of the default minetest_game files are untouched. License of these files is in minetest_game-license.md.
\ No newline at end of file
diff --git a/game.conf b/game.conf
index 8b819bb..bdda077 100644
--- a/game.conf
+++ b/game.conf
@@ -1 +1 @@
-name = Minetest
+name = Minetest Defense
diff --git a/minetest.conf b/minetest.conf
index cda1589..0568377 100644
--- a/minetest.conf
+++ b/minetest.conf
@@ -4,3 +4,6 @@ mgv6_spflags = biomeblend, jungles
 movement_liquid_sink = 25
 movement_liquid_fluidity = 0.8
 movement_liquid_fluidity_smooth = 2
+
+creative_mode = false
+time_speed = 144
\ No newline at end of file
diff --git a/README.txt b/minetest_game-license.md
similarity index 60%
rename from README.txt
rename to minetest_game-license.md
index 9456f81..b3641d7 100644
--- a/README.txt
+++ b/minetest_game-license.md
@@ -1,25 +1,7 @@
-The main game for the Minetest game engine [minetest_game]
-==========================================================
+License of minetest_game files
+==============================
 
-To use this game with Minetest, insert this repository as
-  /games/minetest_game
-in the Minetest Engine.
-
-The Minetest Engine can be found in:
-  https://github.com/minetest/minetest/
-
-Compatibility
---------------
-The minetest_game github master HEAD is generally compatible with the github
-master HEAD of minetest.
-
-Additionally, when the minetest engine is tagged to be a certain version (eg.
-0.4.10), minetest_game is tagged with the version too.
-
-When stable releases are made, minetest_game is packaged and made available in
-  http://minetest.net/download.php
-and in case the repository has grown too much, it may be reset. In that sense,
-this is not a "real" git repository. (Package maintainers please note!)
+minetest_game files include everything except mods/defense*/*
 
 License of source code
 ----------------------
diff --git a/mods/defense/depends.txt b/mods/defense/depends.txt
new file mode 100644
index 0000000..db9e5bd
--- /dev/null
+++ b/mods/defense/depends.txt
@@ -0,0 +1 @@
+defense_mobs
\ No newline at end of file
diff --git a/mods/defense/director.lua b/mods/defense/director.lua
new file mode 100644
index 0000000..e69de29
diff --git a/mods/defense/init.lua b/mods/defense/init.lua
new file mode 100644
index 0000000..7ffeede
--- /dev/null
+++ b/mods/defense/init.lua
@@ -0,0 +1,7 @@
+defense = {}
+
+local function dofile2(file)
+	dofile(minetest.get_modpath("defense") .. "/" .. file)
+end
+
+dofile2("director.lua")
\ No newline at end of file
diff --git a/mods/defense_mobs/depends.txt b/mods/defense_mobs/depends.txt
new file mode 100644
index 0000000..e69de29
diff --git a/mods/defense_mobs/init.lua b/mods/defense_mobs/init.lua
new file mode 100644
index 0000000..29443dc
--- /dev/null
+++ b/mods/defense_mobs/init.lua
@@ -0,0 +1,9 @@
+defense_mobs = {}
+defense_mobs.gravity = -9.81
+
+local function dofile2(file)
+	dofile(minetest.get_modpath("defense_mobs") .. "/" .. file)
+end
+
+dofile2("mob.lua")
+dofile2("unggoy.lua")
\ No newline at end of file
diff --git a/mods/defense_mobs/mob.lua b/mods/defense_mobs/mob.lua
new file mode 100644
index 0000000..872a0f6
--- /dev/null
+++ b/mods/defense_mobs/mob.lua
@@ -0,0 +1,270 @@
+defense_mobs.move_method = {
+	air = function(self, dtime, destination)
+		local delta = vector.subtract(destination, self.object:getpos())
+		local dist = vector.length(delta)
+		local speed = self.move_speed * math.max(0, math.min(1, 2 * dist - 0.5))
+		if speed > 0.01 then
+			local t = math.pow(0.1, dtime)
+			self.object:setvelocity(vector.add(
+				vector.multiply(self.object:getvelocity(), t),
+				vector.multiply(vector.normalize(delta), speed * (1-t))
+			))
+			
+			local yaw = self.object:getyaw()
+			local yaw_delta = math.atan2(delta.z, delta.x) - yaw
+			if yaw_delta < -math.pi then
+				yaw_delta = yaw_delta + math.pi * 2
+			elseif yaw_delta > math.pi then
+				yaw_delta = yaw_delta - math.pi * 2
+			end
+			self.object:setyaw(yaw + yaw_delta * (1-t))
+
+			self:set_animation("move", {"move_attack"})
+		else
+			self.object:setvelocity({x=0, y=0, z=0})
+			self:set_animation("idle", {"attack", "move_attack"})
+		end
+	end,
+
+	ground = function(self, dtime, destination)
+		local delta = vector.subtract(destination, self.object:getpos())
+		local dy = delta.y
+		delta.y = 0
+		local dist = vector.length(delta)
+		local speed = self.move_speed * math.max(0, math.min(1, 3 * dist - 0.5))
+		if speed > 0.01 then
+			local t
+			if self:is_standing() then
+				t = math.pow(0.001, dtime)
+			else
+				t = 0.9
+			end
+			local dir = vector.normalize(delta)
+			local v = self.object:getvelocity()
+			local v2 = vector.add(
+				vector.multiply(v, t),
+				vector.multiply(dir, speed * (1-t))
+			)
+			v2.y = v.y
+			self.object:setvelocity(v2)
+
+			local yaw = self.object:getyaw()
+			local yaw_delta = math.atan2(dir.z, dir.x) - yaw
+			if yaw_delta < -math.pi then
+				yaw_delta = yaw_delta + math.pi * 2
+			elseif yaw_delta > math.pi then
+				yaw_delta = yaw_delta - math.pi * 2
+			end
+			self.object:setyaw(yaw + yaw_delta * (1-t))
+
+			-- Check for obstacle to jump
+			local jump = false
+			if dist > 1 then
+				local p = self.object:getpos()
+				p.y = p.y + self.collisionbox[2] + 0.5
+				local sx = self.collisionbox[4] - self.collisionbox[1]
+				local sz = self.collisionbox[6] - self.collisionbox[3]
+				local r = math.sqrt(sx*sx + sz*sz)
+				local node = minetest.get_node_or_nil(vector.add(p, vector.multiply(dir, r)))
+				if not node or minetest.registered_nodes[node.name].walkable then
+					jump = true
+				end
+			end
+
+			if jump then
+				self:jump(dir)
+			elseif self:is_standing() then
+				self:set_animation("move", {"move_attack"})
+			end
+		else
+			local v = self.object:getvelocity()
+			v.x = 0
+			v.z = 0
+			self.object:setvelocity(v)
+			self:set_animation("idle", {"attack", "move_attack"})
+		end
+	end
+}
+
+function defense_mobs.register_mob(name, def)
+	local prototype = {
+		-- minetest properties & defaults
+		physical = true,
+		collide_with_objects = true,
+		makes_footstep_sound = true,
+		visual = "mesh",
+		automatic_face_movement_dir = false,
+		stepheight = 0.6,
+		-- custom properties
+		movement = "ground", -- "ground"/"air"
+		move_speed = 1,
+		jump_height = 1,
+		armor = 100,
+		attack_range = 1,
+		attack_damage = 1,
+		attack_interval = 1,
+
+		destination = nil, -- position
+		current_animation = nil,
+		current_animation_end = 0,
+		last_attack_time = 0,
+		timer = 0,
+	}
+	for k,v in pairs(def) do
+		prototype[k] = v
+	end
+
+	--
+	-- Callbacks
+	--
+
+	-- extendable
+	function prototype:on_activate(staticdata)
+		self.object:set_armor_groups({fleshy=self.armor})
+		if self.movement == "ground" then
+			self.object:setacceleration({x=0, y=defense_mobs.gravity, z=0})
+		end
+		self.timer = math.random() * 16
+
+		if def.on_activate then
+			def.on_activate(self, staticdata)
+		end
+	end
+
+	-- extendable
+	function prototype:on_step(dtime)
+		if self.destination then
+			self:move(dtime, self.destination)
+		else
+			self:move(dtime, self.object:getpos())
+		end
+
+		if self.movement ~= "air" and not self:is_standing() then
+			self:set_animation("fall", {"jump", "attack", "move_attack"})
+		end
+
+		if def.on_step then
+			def.on_step(self, dtime)
+		end
+
+		self.timer = self.timer + dtime
+	end
+
+	--
+	-- Overridable methods
+	--
+	
+	-- overridable
+	prototype.attack = def.attack or function(self, obj)
+		local delta = vector.subtract(obj:getpos(), self.object:getpos())
+		obj:punch(self.object, self.timer - self.last_attack_time,  {
+			full_punch_interval=self.attack_interval,
+			damage_groups = {fleshy=self.attack_damage}
+		}, delta)
+		self.object:setyaw(math.atan2(delta.z, delta.x))
+	end
+
+	-- overridable
+	prototype.move = def.move or defense_mobs.move_method[prototype.movement]
+
+	--
+	-- Methods
+	--
+
+	function prototype:hunt(radius)
+		local p = self.object:getpos()
+		local nearest_player = nil
+		local nearest_dist = radius + 1
+		for _,obj in ipairs(minetest.env:get_objects_inside_radius(p, radius)) do
+			if obj:is_player() then
+				if nearest_player then 
+					local d = vector.distance(nearest_player:getpos(), p)
+					if d < nearest_dist then
+						nearest_player = obj
+						nearest_dist = d
+					end
+				else
+						nearest_player = obj
+						nearest_dist = vector.distance(obj:getpos(), p)
+				end
+			end
+		end
+
+		if nearest_player then
+			local nearest_pos = nearest_player:getpos()
+			local dir = vector.direction(nearest_pos, self.object:getpos())
+			self.destination = vector.add(nearest_pos, vector.multiply(dir, self.attack_range/2))
+			if nearest_dist < self.attack_range then
+				self:do_attack(nearest_player)
+			end
+		end
+	end
+
+	function prototype:do_attack(obj)
+		if self.last_attack_time + self.attack_interval < self.timer then
+			self:attack(obj)
+			self.last_attack_time = self.timer
+			if self.current_animation == "move" then
+				self:set_animation("move_attack")
+			else
+				self:set_animation("attack")
+			end
+		end
+	end
+
+	function prototype:jump(direction)
+		if self:is_standing() then
+			direction = vector.normalize(direction)
+			local v = self.object:getvelocity()
+			v.y = math.sqrt(2 * -defense_mobs.gravity * (self.jump_height + 0.2))
+			v.x = direction.x * v.y
+			v.z = direction.z * v.y
+			self.object:setvelocity(v)
+			self:set_animation("jump")
+		end
+	end
+
+	function prototype:is_standing()
+		if self.movement == "air" then
+			return false
+		end
+
+		local p = self.object:getpos()
+		p.y = p.y + self.collisionbox[2] - 0.5
+		local corners = {
+			vector.add(p, {x=self.collisionbox[1], y=0, z=self.collisionbox[3]}),
+			vector.add(p, {x=self.collisionbox[1], y=0, z=self.collisionbox[6]}),
+			vector.add(p, {x=self.collisionbox[4], y=0, z=self.collisionbox[3]}),
+			vector.add(p, {x=self.collisionbox[4], y=0, z=self.collisionbox[6]}),
+		}
+		for _,c in ipairs(corners) do
+			local node = minetest.get_node_or_nil(c)
+			if not node or minetest.registered_nodes[node.name].walkable and self.object:getvelocity().y == 0 then
+				return true
+			end
+		end
+		return false
+	end
+
+	function prototype:set_animation(name, inhibit)
+		if self.current_animation == name then
+			return
+		end
+		if inhibit then
+			for _,p in ipairs(inhibit) do
+				if self.current_animation == p and self.timer < self.current_animation_end then
+					return
+				end
+			end
+		end
+
+		local anim_prop = self.animation[name]
+		if anim_prop then
+			self.current_animation = name
+			self.current_animation_end = self.timer + (anim_prop.b - anim_prop.a - 1) / anim_prop.rate
+			self.object:set_animation({x=anim_prop.a, y=anim_prop.b}, anim_prop.rate, 0)
+		end
+	end
+
+	minetest.register_entity(name, prototype)
+end
\ No newline at end of file
diff --git a/mods/defense_mobs/models/defense_mobs_unggoy.b3d b/mods/defense_mobs/models/defense_mobs_unggoy.b3d
new file mode 100644
index 0000000..c1c8d72
Binary files /dev/null and b/mods/defense_mobs/models/defense_mobs_unggoy.b3d differ
diff --git a/mods/defense_mobs/models/defense_mobs_unggoy.png b/mods/defense_mobs/models/defense_mobs_unggoy.png
new file mode 100644
index 0000000..a0257a5
Binary files /dev/null and b/mods/defense_mobs/models/defense_mobs_unggoy.png differ
diff --git a/mods/defense_mobs/models/unggoy.blend b/mods/defense_mobs/models/unggoy.blend
new file mode 100644
index 0000000..7e56977
Binary files /dev/null and b/mods/defense_mobs/models/unggoy.blend differ
diff --git a/mods/defense_mobs/models/unggoy.blend1 b/mods/defense_mobs/models/unggoy.blend1
new file mode 100644
index 0000000..eddc6c0
Binary files /dev/null and b/mods/defense_mobs/models/unggoy.blend1 differ
diff --git a/mods/defense_mobs/models/unggoy.xcf b/mods/defense_mobs/models/unggoy.xcf
new file mode 100644
index 0000000..b109944
Binary files /dev/null and b/mods/defense_mobs/models/unggoy.xcf differ
diff --git a/mods/defense_mobs/unggoy.lua b/mods/defense_mobs/unggoy.lua
new file mode 100644
index 0000000..1a905c7
--- /dev/null
+++ b/mods/defense_mobs/unggoy.lua
@@ -0,0 +1,31 @@
+defense_mobs.register_mob("defense_mobs:unggoy", {
+	hp_max = 1,
+	weight = 6,
+	collisionbox = {-0.4,-0.01,-0.4, 0.4,1.5,0.4},
+	visual_size = {x=2.5, y=2.5},
+	mesh = "defense_mobs_unggoy.b3d",
+	textures = {"defense_mobs_unggoy.png"},
+	makes_footstep_sound = true,
+
+	animation = {
+		idle = {a=0, b=39, rate=30},
+		jump = {a=40, b=49, rate=15},
+		fall = {a=50, b=64, rate=20},
+		attack = {a=65, b=72, rate=15},
+		move = {a=75, b=99, rate=40},
+		move_attack = {a=100, b=113, rate=20},
+	},
+
+	move_speed = 5,
+	jump_height = 2,
+	attack_damage = 1,
+	attack_interval = 0.5,
+
+	on_activate = function(self, staticdata)
+		self:hunt(70)
+	end,
+
+	on_step = function(self, dtime)
+		self:hunt(20)
+	end,
+})
\ No newline at end of file