The Concerned web comic, which is based on and set in the Half-Life 2 game world, recently ended for good. It's a shame that it had to end so soon, but the goal all along has been stated in the comic's description ("The Life and Death of Gordon Frohman"). If you haven't read the comic, I highly recommend it (note that you should start reading from the beginning to best appreciate it). The writing was top notch, the visuals were great, and I will sorely miss the updates that I used to look forward to.