Unreal Tournament 3

These achievements are seriously easy, you can stick it on casual and really have some fun.

The missions are a good mix of deathmatch, CTF, VCTF, and warfare but its real simple and good fun.
you can splitscreen with a friend to work towards co-op and also while in the missions you can work towards majority of the multiplayer cheevos as well.
For example try sticking to just one kind of gun while your in the mission to try and stack some awards for your achievements

anyway you should breeze through this its very straightforward, just dont forget if your going for insane you can do the whole chapter on casual then the last mission on insane just dont forget to change the difficulty.

There is a guy on here with a fantastic guide for that too so check it out if you are doing so

Happy achievement hunting