I played many games in my life but encountered the worst ending ever only recently when finished Kane & Lynch 2. Come on! You must be kidding me... it's not even an ending, it's like a silent f-word in the face... I still can't believe it really happened.
About Fahrenheit, the ending is not so bad, the last parts of gameplay are.
jefequeso: My vote goes to Chasm: The Rift. Not only did it end on an unforgivable cliffhanger, but the cliffhanger itself was just a bunch of on-screen text. No prompting to go back to the main menu, no "To be continued...". Nothing. You just had to quit the game from the pause screen.
Let's hear 'em, guys.
The ending is not so bad if compared to Quake 1.
The game is very atmospheric and fun playing, its main goal was to be like another good Quake 1 clone, but in not so well developed 3d environment.