Pre-order and you get access to the Industrial Revolution pack for free, which includes three gear items, 500 bonus in-game money, five lock picks, plus the Industrial Revolution puzzle game. But that's not the interesting part. Steam is also doing the pre-order reward tier system for BioShock Infinite. As more people pre-order the game, the more rewards you earn. The first reward (already unlocked), gives you a free copy of the original BioShock. On the second reward, you get exclusive BioShock Infinite TF2 items. And the third and last reward is quite a treat, a free copy of XCOM: Enemy Unknown. Have a look at the pre-order yourself.
Green Man Gaming
Green Man is a bit more generous and provides a bit more freedom in what you get for pre-ordering. All pre-orders give you a free copy of BioShock and one free game of your choice out of the following games: BioShock 2, Spec Ops: The Line, The Darkness 2, Civilization V, and Mafia 2. You can have a look at the pre-order here.
This got me thinking. I'm definitely picking up BioShock Infinite, but I was planning to play it on my Xbox 360. Pre-ordering a digital copy of the game online to get free games is quite tempting. I'll need to think about this more before committing to anything.
BioShock Infinite comes out on March 26 for PlayStation 3, Xbox 360, and PC.