buy itwikipedia articlerly
it's great. the singleplayer has like, one of the coolest features I've ever seen in a game. you can control time it's so fun. even the multiplayer retains some time-controlling abilities, in the form of grenades that explode on contact into spheres of... energy, or something, and whenever someone walks or falls or jumps or whatever into them (including yourself and enemies and teammates), it has the effect on them and any projectiles too
in singleplayer (
video), your suit lets you slow down time, stop it, or rewind it
and in multiplayer, you have the same powers, but a couple of them work differently. slow time does the same thing as in singleplayer, but stop time just slows it down a lot more, but there is still some movement. and rewind doesn't rewind everything in it in the way you might expect. rather, if you jump into it, you'll go in some amount, and then it'll start to rewind you, pushing you back out the way you came in. it does the same thing with projectiles, so if you shoot into it, it's possible that your bullets will hit you
both are very fun
it has a really cheesy story though, so if that matters more to you than like the coolest gameplay ever don't buy it