Considering this is asking what your favorite video game movie is, I'm pretty sure the entire thing is a toss up of what you prefer.
My vote also goes for Mortal Kombat
for reasons Patrick and Pedro have already expounded upon. Silent Hill
would be second, but I prefer the over-the-top tone of MK. It's a fun movie. I know I'm probably alone, and I know it wasn't very good, but did anyone else watch the weekly MK series that aired on TNT a while back? I think it was in the late 90s or very early 00s. I loved it for reasons I am unable to explain.