Endless, in both the full version and the beta release is only unlockable by beating the game to as far as one can get in that version. It is exactly what it sounds like, a mode in which one chooses from a variety of maps, and after choosing, faces endless standard enemies. The game stops when you die. There are also modes in which the player will die after 20 seconds game time, or after 20 kills, or after 60 seconds realtime. The game records high scores for each of these. There is also an acheivement for killing a total of 1987 enemies total. The maps are POWERPLANT, which has something similar to the pyramid in 32CORE.