Samurai Warriors 2 is an experiment in how many times a rat will hit a lever before it gets sick of the pellets. The action is simple: You're a hero tearing across a battlefield, cutting a swath through enemy infantry—and that's all you do, mission after mission, hour after hour. Aside from a few tactical details and boss fights, you're just a killing machine, mashing a single button as quickly as possible.
Ninety-Nine Nights recently tried to put a more epic, dramatic spin on the same concept, but Samurai Warriors 2 is as garish as a pizza-joint pinball machine—and much more fun for it. Distractions and bonuses keep whizzing by, from the steady stream of power-ups to the running B-movie dialogue with your comrades—like Keiji Maeda, who talks like a surfer and sports a hairdo like an electrocuted shih tzu. The game nails the balance between action and payoff, giving you just enough rewards for your brainless twitching to make the action addictive. And with more than a dozen characters and plenty of combos to unlock, it'll take hours to beat the game, even though not much changes along the way. It isn't a great game, but you aren't the first rat it's experimented on, and it knows how to keep you playing.