People who rate low: Go play Star Wars or Lego something...
I originally purchased this title for PS3 a little more than a year back (for 7.50) and was floored at the quality, detail, storyline, and overall fun. This game was a little before it's time, but the sequel and threquel should do it proper justice, primarily due to word of mouth. The word "Good" was over-used in critic reviews, as it's hella-fun to play, and other games stole parts (like the rapelling/jumping ... DeapSpace3. Total rip-off.)
I truly loved playing this on PS3, and now am downloading to play again on PC and will enjoy even more the second time through (with much better graphics and physics.) I am glad some portion of my membership went to the creators of this game, well deserved, but the should be offered more limelight.
I don't know why this game got such low reviews, I've been playing for a few hours and it's pretty awesome, sotry line is good, bosses are good and it's a pretty sick 3rd person shooter all around. Specially for this game being free to play, Can't ask for more really!