Honestly a fairly fun game. Reminds me of the new DOOM games (haven't played them, just based off of what I've seen) in some ways. Pretty funny most of the time too, unfortunately dragged down by Justin Roiland's constant-stammer-type humor that has become somewhat grating over time. Gameplay-wise it's got a good amount of variety between weapons. Never found it very difficult, which was fine because I don't think that's the intention. It felt good and cool to shoot a lot of the guys, which I think was more the idea. Just a cool feeling run around kind of game. It's also pretty short, I beat it in like 6-7 hours which is the perfect length for what it was.