The revamped Resident Evil: Revelations for consoles and PC has found its way on to Steam, offering pre-purchase rewards based on how many folks pay up before launch. Currently, the game is sitting pretty with the first tier unlocked (an art book and 13-song soundtrack) and more than five weeks to go before release.
The next two tiers are a free copy of Lost Planet: Extreme Conditions and a season pass, respectively. This third and final pre-purchase bonus encompasses "four pieces of additional content" which Capcom has not fully detailed yet. For what it's worth, the description on Steam does say the pass will "expand your Raid mode experience."