Creating A 21st Century Video Game
Fluid Dynamics Class Inspires College Student To Develop 'Plasma Paddles'

http://www.sciencedaily.com/videos/2007/1112-creating_a_21st_century_video_game.htm

This is a game development by some student that become a smash hit overnight.
Gonna download this game.

Another game that I saw my friend play which looks like fun is plant vs zombie.