I got the Pyro achievement when I flamed half the enemy team to death (6 people) while they were trying to cap the tower in gravelpit. :)
Hydro is a really well-made map, I just wish it made more sense. It's extremely annoying when pieces of the map appear and disappear. I often spawn at the beginning of a round and spend the first 45 seconds trying to figure out how to get out of my base because all the doors are locked!







