Very underappreciated. Great game.
Overall this game feels like gears as the gameplay is very similar e.g taking cover. It isn't as good as gears but is still a pretty good game, I dont really think it's got much replay value and probably the only reason to play through again would be for the 110 GS for beating the game on Brutal Difficulty, If you think its worth the effort.( I know I dont ) As for online gameplay barely anyone plays it, there is only 2 game types and about 6 maps. If people played it I think the online would be pretty good, but they dont.
Dark Sector is a great game for a first play through but towards the end of the campiegn it starts getting repetitive. It got me about 600 GS and didn't take too long, If you want some GS and A fairly good good game to get it on aswell then try Dark Sector out.