I think single player is pretty solid though there are four main issues I'm working on: 1. Triggers being lost. This has various effects like missing doors, can't pick up some items. (MP only) 2. Invincibility cheats. 3. Seeing full servers on matchmaking menu. (MP only) 4. Game freezes. I think I've fixed them and the game feels be much better but it needs to go into test for some weeks before it will be released. I did all the artwork. The music is by a guy called Emid and the song is called Underworld. If you google 'Emid Underworld' you can find it. The trouble with updating games is that it takes time and money. I don't mind updating ISZ because I hate the fact that it has bugs & exploits.