From the Review:
"That simplicity, that Spartan sensibility extends to the five character classes, which are barely distinguished by a handful of unique weapons. The sniper has a hunting rifle, a handgun, a throwable explosive, and a melee weapon. The engineer has a couple of high-powered anti-vehicle weapons, a throwable explosive and a melee weapon. And so on. There's the barest ability to modify the loadout for a class and zero allowance to unlock new weapons, like land mines, or earn upgrades for existing weapons to make them more effective."