Buy 15 upgrades.
Buy 12 upgrades.
Buy 9 upgrades.
Complete level 5.
Score 25,000 points or more in one Trial Mission.
Complete level 4.
Complete level 3.
Kill 1,400 enemies.
Unlock 18 gallery entries.
Kill 1,200 enemies.
Kill 1,000 enemies.
Take a total of 1,000 damage.
Fire offensive weapons a total of 5,000 times.
Kill 500 enemies.
Unlock 12 gallery entries.
Unlock your third gun.
Kill 250 enemies.
Complete level 2.
Unlock 6 gallery entries.
Buy 6 upgrades.
Unlock 3 gallery entries.
Complete level 1.
Buy 3 upgrades.