Start on a stranded space platform. Minimal changes to make it possible to win the game this way.
Scenarios, maps, and puzzles.
All resources are replaced by enemies that drop those resources when killed. Features include elite enemies, evolution/distance-based loot bonuses, per-resource multipliers, and automatic mod support.
Mods introducing new content into the game.
Play the classic roguelike NetHack inside Factorio. I compiled the actual NetHack C code to WASM, interpreted by a pure Lua WASM interpreter.
Scenarios, maps, and puzzles.
Replaces the engineer with Robin Hood from Robin Hood: The Legend of Sherwood.
Small changes concerning balance, gameplay, or graphics.