The game now runs on verson 4.03 of the CRX engine, based on the id Software GPL source codes
As promised, COR Entertainment has released Alien Arena 2006, the sequel to CodeRED: Alien Arena that offers 25 total levels, 9 detailed characters, 8 weapons, 2 vehicles, 5 gamplay modes(DM, TDM, CTF, All Out Assault, Deathball), and more. New for Alien Arena 2006 are five mutators(instagib, regeneration, vampire, rocket arena, and low grav), and Deathball, a mode in which you get points by capturing a ball and firing in into a goal. Eight new levels have been added, as well as alternate firing modes for several of the weapons. The game now features colored names, an improved console, and an enhanced in-game server browser.