Finally found my childhood game :)

[tomangelo]

Real time pvp is currently available through Code Battles, it require to code it all before start though (current CBOT state allows you to build whole base and robots, all you need is source of Titanium cubes and GrabberBot, it's gonna be probably replaced with new BuilderBot), with survival there are concepts of random level generator and invasion mode, which are likely going to be implemented someday. There was even some unofficial working real-time multiplayer build, but it was long time ago. It might be also added officially to game sometime.