Usually, no one remembers the bronze medalist, but for an indie downloadable title to beat out all the heavyweights below makes it the best second runner-up EVAR. There aren't enough adjectives to describe Playdead's 2010 word-of-mouth critical darling, so we'll make some up: dorfensbergeric, slangtaculactical, and amazitometering. We used some regular words in our review of the game last year, in case you're a stickler for things like "actual English."
FUN FACT: In an interview with Gamasutra, the game's developers noted that the inspiration for the level design was envisioning the player as "their worst enemy" and making the puzzles as devious as possible. Thanks, guys.