diff --git a/.github/workflows/luacheck.yml b/.github/workflows/luacheck.yml
new file mode 100644
index 0000000..a03fe92
--- /dev/null
+++ b/.github/workflows/luacheck.yml
@@ -0,0 +1,17 @@
+name: luacheck
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: apt
+      run: sudo apt-get install -y luarocks
+    - name: luacheck install
+      run: luarocks install --local luacheck
+    - name: luacheck run
+      run: $HOME/.luarocks/bin/luacheck ./
diff --git a/.luacheckrc b/.luacheckrc
new file mode 100644
index 0000000..9869585
--- /dev/null
+++ b/.luacheckrc
@@ -0,0 +1,24 @@
+unused_args = false
+allow_defined_top = true
+
+globals = {
+	"radioactive_gas"
+}
+
+read_globals = {
+	-- Stdlib
+	string = {fields = {"split"}},
+	table = {fields = {"copy", "getn"}},
+
+	-- Minetest
+	"minetest",
+	"vector", "ItemStack",
+	"dump", "VoxelArea",
+
+	-- Deps
+	"unified_inventory", "default",
+	"vacuum",
+
+	-- optional mods
+	"planetoidgen"
+}
diff --git a/depends.txt b/depends.txt
new file mode 100644
index 0000000..6e2f582
--- /dev/null
+++ b/depends.txt
@@ -0,0 +1,2 @@
+default?
+vacuum?
diff --git a/gas.lua b/gas.lua
new file mode 100644
index 0000000..bff925a
--- /dev/null
+++ b/gas.lua
@@ -0,0 +1,54 @@
+-- radioactive outgasing of ores in vacuum
+
+-- gas definition, drowns and is slightly radioactive
+minetest.register_node("radioactive_gas:gas", {
+	description = "Moon gas",
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	drawtype = "glasslike",
+	drowning = 1,
+	post_effect_color = {a = 20, r = 20, g = 250, b = 20},
+	tiles = {"planet_moon_gas.png^[colorize:#E0F0E033"},
+	alpha = 0.1,
+	groups = {
+    not_in_creative_inventory = 1,
+    not_blocking_trains = 1,
+    cools_lava = 1,
+    radioactive = 3
+  },
+	drop = {},
+	sunlight_propagates = true
+})
+
+-- ores gas out in vacuum
+minetest.register_abm({
+  label = "moon ore outgasing",
+	nodenames = {"vacuum:vacuum"},
+	neighbors = {
+    "default:stone_with_diamond",
+    "default:stone_with_mese",
+    "default:stone_with_gold",
+    "default:stone_with_iron",
+    "default:stone_with_coal",
+    "default:mineral_uranium"
+  },
+	interval = 5,
+	chance = 10,
+	action = function(pos)
+    minetest.set_node(pos, {name = "radioactive_gas:gas"})
+  end
+})
+
+-- radioactive gas removal if near air
+minetest.register_abm({
+  label = "radioactive gas removal",
+	nodenames = {"radioactive_gas:gas"},
+	neighbors = {"air"},
+	interval = 5,
+	chance = 5,
+	action = function(pos)
+    minetest.set_node(pos, {name = "air"})
+  end
+})
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..14a7d9c
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,5 @@
+local MP = minetest.get_modpath("radioactive_gas")
+dofile(MP.."/gas.lua")
+
+
+print("[OK] Radioactive gas")
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..62ac5c6
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,10 @@
+
+# Radioactive gas mod for minetest
+
+Spawns radioactive gas around ore and vacuum nodes
+The gas disappears again if in contact with air
+
+## Dependencies
+
+* default?
+* vacuum?