As amazing as special effects have become, the best part of them is how accessible CGI has become to the general public. These are a few offerings, all inspired by video gaming franchises:
Portal: No Escape
Half-Life: Escape From City 17 – Part One
Half-Life: Escape From City 17 – Part Two
Beyond Black Mesa
Not only the quality of these is constantly improving, but the plot development is usually so well done that makes most Hollywood movies feel like crap.