Well i'm not sure about your taste...
It is an FPS game, with an ok story, just like the movie Legasy...i mean it has similarities to it.
you have different types of weapon as the famous throwing disc...
You have different ways to upgrade yourself, you need to work on tactic, unless you're a deadly eye marksman who does head shots only...so you can take out few at once...there are different types of enemies, obstacles...i'd say as a old games lover...i passed the game around 2-3 times in the last year...which means if you got into the game, you'll want to replay it, if not...then not.
There are some secrets that are hard to find sometimes, that gives you something, that i don't exactly remember what...
Every weapon has his different upgrades of example, throwing disc becomes 5 throwing discs that you can throw at once, instead of one and wait till it returns.
In general, i don't really know what to say, i don't want to mislead, each one of us is different.
From my perspective, game is fun, get it if you want. oh and it could be frustrating sometimes because of some moments, which i'm not going to spoil.
Hope this helps...