Earn 100 medals.
Complete Stage 8 without using power-ups.
Collect all the cards.
Destroy at least 15 enemies with one Mega-Bomb.
Destroy all enemy towers on Stage 5.
Collect 100 000 stars.
Burn through 10 enemies with your Laser.
Ram through an enemy wave with your Energy Shield.
Destroy 10 000 enemies.
Finish a stage with your health lower than 5%.
Earn 10 medals.
Rescue 100 people.
Destroy 1 000 enemies.
Destroy the lighthouse without touching it.