It's AC1 with 30% of the missions and variety, much beefier enemies, and a more straightforward plot with actual characters. The arena is however a fun addition that allows you to try out all sorts of builds in a real fight without worrying about ammo/money, but the overall experience is reminiscent of a $15 DLC pack and not a new installment

"THIS IS NOT A REQUEST! I HAVE BECOME PHANTASMA! I WILL DESTROY EVERYTHING"