GameZone's Stevie Smith writes,
"First and foremost, in terms of allaying fears regarding the prospect of swiftly crumbling standards, Call of Duty would certainly be in safe hands without Infinity Ward. Activision's increasingly dubious image aside, long-serving understudy Treyarch has carved itself a respectable reputation in the marketplace after helming three Call of Duty titles since 2005, while franchise newbie Sledgehammer isn't without considerable promise.
Treyarch, in representing something of a dependable Obsidian to Infinity Ward's BioWare, has enjoyed its fair share of critical and consumer success after 2008's Call of Duty: World at War, which utilized an older version of Infinity Ward's proprietary IW game engine and found its way into more than 11 million homes around the world. And, although Sledgehammer's worth is as of yet unproven, the studio is powered by former Visceral Games heavyweights Glen Schofield and Michael Condrey, two of the creative forces behind acclaimed sci-fi shockfest Dead Space."