I put 50+ hours into this and even reached top 100 on the leaderboard at one time, but I never actually beat the final boss, so I'm unwilling to call it done.

Perfect arcade FPS. Understands the joy of nuance. Wonderful ambience, looks great, plays buttery smooth, rewards purposeful play with continual improvement. One of the best games ever made, easily, and completely blows Devil Daggers (a game I already thought was perfect!) completely out of the water.