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.
Each sentry can now be upgraded in 25 levels. Upgrading increases impact damage, armor, reach and improves the chance that the sentry fires a special effect shot.