By the time you finally reach your first nondescript metal robot, you'll cry with tears of joy. If you're the type of person who would wade through a half-frozen river in your underwear in order to get the hostess snack cake waiting on the other side, then you shouldn't have any problem pushing yourself through the opening area. There's nothing shooter fans like more than jumping puzzles, unless the jumping puzzle also kills you if you don't perform it perfectly. It's time for a little invasive surgery. So it's a boar, with treads.
Later levels fare a lot better.
The maze-like structure and confusing layout of the levels turn into something a lot more palatable by the time you hit Greece and Norway, but that's when you really get a chance to feel the game out for what it really is, which isn't too much of anything in particular. It's about as charming and inviting as Blood II was a year or so back, and much less of a grabber than Kingpin. The weapons in the game are badly tuned, to the point of frustration. The Ion Cannon for instance ricochets around corners, which in terms of actual gameplay means that it usually ricochets back from a wall and hits you, causing you a fair amount of damage. The rocket launcher is incredibly slow, and even the shotgun is awkward, firing off six fat shots before taking its time to reload.