Launched Primal Carnage last night just to collect the trading cards. Got an achievement for starting it up. It's a multiplayer game (ugh) that no one plays anymore. Great.

48. Titan Attacks

Got so many achievements in the first hour (and the rest the second day) that it must look like I cheated.

Sorry to necro, but I think this is an important topic. Anyone care to start listing games where rapid unlocks are a dead giveaway that someone is cheating?

Universe Sandbox: One Minute, One Hour, One Day, One Month, and One Year achievements need that amount of time to unlock

Master of Orion

Originally posted by FlatBurrito:

Team Fortress 2 absolutely. 25 achievements out of 477!

I think I have y'all beat. I only completed the TF2 tutorial: 1 out of 477.

EDIT: That is, except for Arveragus

Poker Night 2 is vastly easier than Poker Night 1. The first game has an achievement that requires you win a hand with a straight flush... if you're lucky enough for the game engine to recognize that you did it.

I just did Mark of the Ninja. Fun and not too difficult.

There are plenty of walkthrough videos of Defense Grid and Deus Ex to help with those. Bastion, too.