Legendary is average in just about every way a game can be. Its cookie cutter settings and familiar enemies are generally plain and lackluster, but not quite to the point of being ugly. The action, which has players shooting, hacking, and healing all in roughly equal measure, is competent but utterly conventional. And its narrative contains interesting concepts and characters that, unfortunately, are never fully explained or developed.
Then there are all of the little annoyances. Fallen debris creates narrow, utterly contrived paths through each environment. You can jump long and far, but seemingly only a couple of inches from the ground, which means huge gaps can be cleared easily but that you can't hop over, say, a fallen 10-inch wide column. And there are many places in which there is no end to enemies, which can prove enormously frustrating when trying to concentrate and solve one of the game's many environmental puzzles. Simply put, there are enough excellent first-person shooters vying for the dollars of mature gamers that it makes little sense to settle for a inferior experience like Legendary.