Penny Arcade Adventures: On the Rain-Slick Precipice of Darkness - Episode One
Playing RSPD is a little like reading archived Penny Arcade comics in a row for a few hours. The writing and artistic style are the same, and it's damn funny. Some parts, e.g. the mysterious narrator, may seem a little over-the-top sometimes, but in general it's still high quality humor.
Some outlets have given the game flak for the actual gameplay being not-so-good, and what you should know is that it's not bad. Sure, you may be able to buy a game with more refined and intriguing RPG elements in a box on a store shelf, but considering it's not even the primary bullet point of RSPD, the real-time menu-based combat (think Final Fantasy 4-9) is actually fun.
I've only played the demo so far - need to clear out some time in my schedule before I can justify buying the whole game - but it's a definite sell for me, and at this point I'm pretty much sold on the rest of the series' episodes, too.
EDIT: it was on sale this weekend on Steam, so, I leapt. I haven't started playing yet, but this bumps it up in the queue...
Progress: Finished demo