Half-Life: Raise the Bar is a fan-made short film inspired by the Half-Life franchise.
Mortal Kombat: Legacy II - Episodes 1, 2 and 3
Here are the first three episodes of Mortal Kombat: Legacy II.
Portal: Survive! is a live-action short film based on the Portal game, and its tie-in comic Portal 2: Lab Rat.
Portal 2 - Turret Trailer
Valve spills the beans on the technical aspects of the turrets encountered in Portal 2.