Farm Fortress is a persistent tower defense/farming/action/multiplayer game where you plant exotic plants and defend these against hungry mutated monsters, corporate robots and other players. Plants grow regardless if you're playing or not. You can design your fortress with walls, sentries and traps and help defend it yourself. Buy new equipment, attack other players or gather allies to help defend your fortress.
There are now craftable items in the shop. Drops from enemies are used to craft items (for example, the Minigun needs Scrap metal, which mechs drop now and then, as well as money.)