I have almost 800 hours in KF1. I first played it on a different account before i got it on this one, combined i have well over 1200 hours, The first game was great. Coming from L4D and l4D2, the seemingly endless amount of maps was a breath of fresh air. When i got KF2 i noticed there were minor differences. Things that made KF1 original were gone for the most part but not in a bad way. All in all this is a fun game and is very easy to put hours into, and with Tripwire updating often the game will stay fresh for a long time.