Valve are introducing the Perpetual Testing Initiative for Portal 2 with this new amusing trailer.
When Gordon Met Chell
Portal joins forces with Half-Life in this short film called When Gordon Met Chell.
Portal: No Escape
Check out this excellent short film based on the Portal video games, called Portal: No Escape.
Half-Life: Raise the Bar
Half-Life: Raise the Bar is a fan-made short film inspired by the Half-Life franchise.