#1. It’s fun to play.
That’s the only info you really need to judge it. Lots of things go into that. The callouts are campy and fun. The shots are fairly forgiving and fun. Destroying saucers is always fun, and a bit dangerous of a shot right in the center. I just enjoy playing it. And Total Annihilation is reasonable to achieve, and again tons of fun. The game is just immersive, and fun to shoot. That’s what you want from a game.