A new game with a nice background idea is”Target: Mainframe”. Here are a few lines from GBAdev…

You play the part of Linus Torvalds in an attempt to bring Linux to Microsoft. You’ve broken into the Microsoft headquarters and now all you have to do is find the mainframe computer and upload a worm which will install linux on and computer on the network. The mainframe however is hidden, Find it and help Linus complete his mission!

http://www.ice-d.tk/