Haven't had the chance to play what I consider to be the best horror game of its generation? Well you're not gonna get a better chance than this. Dead Space is currently free on Origin. You legitimately don't have to pay a single cent.
Head here if you want to take EA up on its offer. I'd say you're crazy not to. It's been a while since I've played Dead Space, so I might have the rose-tinted glasses on, but I loved it to death. The series -- in my opinion -- went downhill shortly afterwards but this was the pinnacle.
Get on it.