Thresh's comments in BLACK
Kenn's comments in BLUE
The one thing that separates Half Life from all the FPS games that have come before it is an amazing single player experience. The puzzles are intricate, yet logical, and your actions ALWAYS rewarded by something cool. What more could you ask for? Here are a few pictures to whet your appetite, so when the feast finally hits, at least you won't die of shock.
No more dark, dingy browns and greens

Hmmm...what do these conspicuously interconnected things things do?

Complex visuals are Half Life's trademark...intriguing puzzles follow right behind.

Welcome to Xen...it's not your father's alien world

The mother of all headcrabs? Nice babies! Sit! Sit!