An incomplete game that had so much potential....
I loved the graphics and sound, they were truly amazing which is where most of the points from my score are coming from. However to me, the cons outweighed the pros. Some of my biggest problems I had with it were the completely ridiculous save system, how repetitive the levels were, and how the enemies re-spawned despite killing them.
I didn't care to go back through rooms where I had already killed all of the zombies/worms...etc. Secondly, the save system was entirely broken. The games play and puzzles were fun for sure, however if you happened to die, you had to go back and complete the whole level again including puzzles and defeating enemies, which got quite old, real fast. Lastly, the games levels indeed were fun and impressive as far as looks and sound, but you did start to know what to expect chapter after chapter. Unless your totally hardcore and enjoyed it a lot, there is next to no replay value.
My whole review probably seemed very negative and totally against it, and I felt all of my comments were justified. However, it did have its positives which got it the 6 I gave it. There are many other games out there I would recommend over this, so unless you've played everything else, look elsewhere.