Reach level 1.

Survive your first wave.

Choose your first upgrade.

Use your first ability.

Unlock your first ability.

Defeat the Brute.

Unlock your first weapon.

Defeat the Launcher.

Change your equipment for the first time.

Defeat the Laser Fiend.

Defeat the Megashield.

Defeat the Jammer.

Reach wave 50.

Defeat the Monolith.

Defeat the Spine Dragon.

Defeat the Trashmaster.

Use each of ViKing 2000's abilities at least once.

Reach wave 100.

Unlock all weapons.

Unlock all abilities.

Defeat the infected Triforce.

Defeat the Modulator.

Activate all 4 abilities within one wave.

Combine the laser upgrade with the missile split upgrade.

Defeat a scarecrow.

Reach the Virus Zone.

Reach wave 50 with a mutator.

1,000 opponents have corrupted the core.

Play a weekly challenge.

Combine the Arc Emitter's piercing shot with explosive hits.

Connect 10 opponents simultaneously with the laser.

Equip the same weapon 5 times and reach at least wave 50.

Improve your tower rotation at least 4x in one run.

Reach level 45.

Reach wave 50 with 4 mutators.

Equip a different weapon in each slot and reach at least wave 50.

Defeat every opponent with every weapon and every status effect at least once.

Unlock everything.

Upgrade your Gatling cannon to a smartgun that keeps its projectiles alive.

Release a cannon projectile to bounce between 20 opponents.

Beat wave 100 in the Virus Zone.

Try interacting with at least 10 system observers.