Half-Life meets Halo, but you can dig a hole with C4's. Not all the time and there's a ghastly difficulty spike with instakiller X-Ray snipers and my blood bursted at the chance of me auto-saving right before an instakill, there's still an admirable amount of runaway shooting and destructable terrain to behold through vehicles until that damned part arrives. An enjoyably amusing, if maddening baby step of the franchise.