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edits
Changes
→Alien Ships
All aliens except Landers can exit at the bottom of the screen and emerge from the top, or vice versa.
===Rescuing Humanoids===
You begin the game with ten humanoids. When a humanoid is kidnapped, it cries out for help. The Scanner is the fastest way to spot its position.
There are two ways of rescuing a humanoid: either destroy the Lander and let the humanoid fall back to the planet; or destroy the Lander, catch the falling humanoid, and carry it back to the planet. Letting the humanoid fall only works if it's low enough to fall safely. If the humanoid falls safely, you score 250 points, plus 150 points for destroying the Lander. If the humanoid dies, you score only the 150 points for the Lander.
Catching a humanoid in midair is more difficult and earns you more points. To catch a humanoid, shoot the Lander and maneuver Defender to touch the humanoid, then carry it to the planet. This earns you 1000 points, plus 150 for the Lander. If you catch the humanoid but don't return it safely, you still earn 500 points, plus 150 for the Lander.
If the Lander succeeds in carrying a humanoid to the top of the screen, the humanoid becomes a Mutant and returns to attack Defender. When all of the humanoids become mutants, or are destroyed, the planet explodes and vanishes. You continue to play and score points. With every fifth wave, a destroyed planet reappears and all ten humanoids are replaced.
==References==