Dead Space, Resident Evil 4 Rip-Off?

Dead Space borrowed the essential parts of the much appreciated series and from there refined some points for innovation. Copying somebody's work and then working on enhancements is never a bad thing as the game's producer said, than creating a totally new game with too much innovation that players tend to get lost. It's the way to incorporate the good things from the past to the continuous enhancement of the future.

Source: How Dead Space Wisely Ripped-Off Resident Evil 4.