Blast off and fight!
Twin Strike is a vertical shmup in which you, as the pilot of either a helicopter or a jet, must destroy alien ships and defend Earth! There is no end, it just gets harder with each loop. There are three distinct backgrounds and two possible pieces of background music, so the scenery and music shuffle with each round.
Scoring and missiles
Every time you kill an enemy, you fill your missile meter by one. Every three points nets you a powerful missile you can launch with the z key. If you fill all twelve points, you get a score 2x multiplier that lasts until you launch a missile. If you launch when you have all 12 points, you get a smart bomb explosion that eliminates all bullets and hurts everything on the screen, but you also spend nine points instead of three.
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