This is essentially the Opposing Force for Half Life as this is to AC1. Missions are much better, though in shorter quantity. Story is a lot more concise and actually pretty entertaining, too. All the new parts introduced are kind of awesome, especially the final part acquired from the Arena which is just a complete melter to anything it touches.

Speaking of Arena, Arena! This is the first time it appeared in true form and its quite good! Very basic, but the fights are fun, the maps are varied, and some fights are completely fucking bullshit! (Pale Rider is quite literally just insane)

Good entry!