OT 's characters are a mix of speed, firepower, rate of fire, turning ability, and other useful comparisons. What's more, each character's weapons are genuinely unique. I mean, Fei-Yen Xn fires a swarm of pink hearts. See, it's unique. The accompanying sound effects are nice, if a little generic.
Most weapons sound approximately the same, and the voices are a flat computer drawl.
Music is an odd mix of video game techno to stuff that sounds like Kraftwerk meets the Cranberries to Imperial March-like nocturnes. OT is intelligent. You have to think and move quickly to play this sucker, not just jam out pre-programmerd 50 hit combos. The computer will bury you for a while, even on the weaker difficulty settings. This presents a slight problem if you start out on single-player like I did.