Really, it's mostly RE4, in space, with some kinda new interesting mechanics and a decent plot. Doom 3 is nowhere close.
... one look at the game will tell you that. It's more strategic with the dismemberment than RE4, and the zero-g sections are really nice. Atmosphere is gorgeous and yes, it has some gimmicky features like the stasis and kinetic abilities. Immersion is very present and everything but saving screens and the start screen is real-time. It's better than RE4 in terms of gameplay (IMO) and is as close to Doom 3 as any other shooter.
But mostly, its nice to see EA is actually making interesting titles, and I don't mean publishing, I mean really developping them (Dead Space was made by an inhouse studio in Redwood).
A good game, brings some nice additions to the survival/resident evil forumla, but not a masterpiece or anything.
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[fanboy mode]
omg **** u
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