One hell of a rerelease.
Lets just get this out of the way, nothing much has changed in single player, they've added stuff like Boss Rush and a score based way of going through the game, but I for sure didn't buy this game for single player. Its good, but multiplayer is where it's at.
Lost Planet's multiplayer I believe is the most underrated by far. I feel it can be a lot funner than FPS multiplayer which some people can instantly be great at and destroy everyone else leaving there not much fun to be had. Lost Planet's multiplayer is a great mix of third person shooting, a little bit of platforming thanks to the grappling hook, and mech battles. Most of the time theres just so much going on and exploding things can get really chaotic, yet fun.
Colonies includes all the downloadable maps for the original Lost Planet along with some new ones. New modes include Arkid hunter where you play as one of the huge bugs while other players try to take you out. VS Annihilator where everyone is trying to destroy the other teams VS suits. Counter grab which is like king of the hill, you have to keep and hold data posts the longest. Point Snatcher is a mode where your team has to accumulate the most thermal energy. Arkid egg hunter has you stealing Arkid eggs trying to get them back to the base. and Egg bandit which is like oddball in Halo.
None of the new modes aren't fun to play. With the huge amount of maps and now even more modes of play, the multiplayer will have you coming back for a while to come. Another plus to the multiplayer is the fact that you can have cross platform play between 360 and PC users.
Another new additions are weapons. Humans get hand guns, revolvers, flame throwers, and Capcom's favorite the handcannon. New VS weapons include a pile driver which fires a long spike, VS rifle, Rocket pods, and a laser lance.
Other additions include new perspectives. The "RE4" camera (not really called that) really isn't that spectacular, it just zooms you closer to the character model, and FPS mode just gives you a first person perspective and a cross hair, you don't see a gun. Much like GRAW FPS was.
Overall, if you loved Lost Planet's multiplayer, you should pick this one up being that its a definite revival of the online community. If you don't have live, then it's a pass.