A hidden gem IMO. It's a fun "wave defense" style game, and I really like all the different units you can make, and the various missions.

The soundtrack is great too! In "Angel", Season 5 Episode 5, a song from this game is playing at the party, and Spike says "this might be the greatest song ever written".

Probably the worst (single player) game that I still enjoyed enough to beat twice. Some of the endgame would be much worse without savestates.

Very fun game. There are a few missions that are unnecessarily hard, but nothing too bad.

The name of this game is the infinitive form of the verb to defend in Spanish and I think that's beautiful.
Nice spaceships.