I got the game got Christmas with my 360 and 2 other 360 related things. At the time, I didn't know anything about it.
The first security alarm, nothing happened. I'd say it was a glitch, but I didn't even know wtf is was at the time....second time was pure hell...everything went pitch black, then spotlighted me, vision blurred and splicers appeared from all directions. I felt godly when I survived it with barely a mark XD
360 is better because too many buttons makes it too complicated D: I'd probably have died 50 times on PC, I NEVER died on 360 :D I even replayed the final boss battle like 4-5 times, no problem. And it wasn't on easy, it was on like...normal. I'm sure I'd utterly suck at Hard, though XD