Is Dead Space really the scariest game of all time?

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I played through the first 2 chapters on medium and it felt easy because I could kill enemies in two shots and be handed a ton of ammo.  The game is excellent but why is this declared to be scary by so many websites and gamers?  Am I not far enough in the game, or just not appreciating the creepy atmosphere enough?  Anyway what are your top 5 scariest games (they can scary just for being terrible games too)

Mine are:

5.  Doom 3 and Resident Evil 4 (tie)

4.  Silent Hill 4

3.  Condemned

2. Silent Hill 2

1. Resident Evil