This mod randomizes the recipes with in the game. While at the same time having code that will make use the game stays possible.
Large total conversion mods.
A control.lua script that will display how long a player has been gone from a multiplayer game. From the games perspective.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
You can now only place blueprints down of entities that you have researched.
Small changes concerning balance, gameplay, or graphics.