For Your Viewing Pleasure: Escape from City-17

"What can you do if you happen to have the kind of computer equipment you want and just $500 Canadian (US$400)? Do what two indie filmmakers did: make a movie! This is what gamer-filmmakers David and Ian Purchase did when they came up with a short film called Half-Life: Escape from City-17 in 2008. Using machinima and Valve’s Source engine, they managed to create a movie that combined CGI, photographs and traditional video." (Excerpt from here.)