Sanctum 2 blends the action-packed first-person shooter genre with the strategic elements of tower defense games, and as a "Jack of all trades, master of none," it isn't particularly strong as either. But to employ yet another overused cliché - the whole being greater than the sum of its parts - it nonetheless manages to be an intense and surprisingly fun multiplayer blast-fest.
First-person shooters are cool. Tower defense games are cool. It only makes sense, then, that putting them together will result in coolness squared, which is what Coffee Stain Studio is aiming for with Sanctum 2.