If you’re eager to earn an early advantage on the battlefield, then you might want to consider pre-ordering your copy of Killzone: Mercenary. Online retailer Amazon.com has revealed that by registering your interest in the upcoming first-person shooter, you'll unlock Blackjack’s Briefcase, which boasts some beefy bonuses.

Uncapping the digital carrier will augment you with a Double XP bonus for 48 hours, allowing you to maximise your salary for a couple of days. It will also come stuffed with a wad of dollar bills, permitting you to head straight to the armoury and customise your load out before you’ve even completed a contract.

Amazon.com also revealed the title’s box art, which we’ve handily embedded to the right. Rumour has it that the guys in the centre of the pack shot are late for their lunch.

[via amazon.com]