Kill monsters with all the ways possible.

Upgrade Holy tower to the max.

Save 1000 gold.

Find all the spawns on any level except 1st one.

Upgrade Electric tower to the max.

Kill 1000 monsters.

Heal yourself 20 times during a single level.

Kill 100 monsters.

Upgrade Garlic tower to the max.

Earn 100 000 gold.

Buy all the character upgrades.

Get knocked-out 5 times during the single level.

Save the nearly destroyed Gates after knock-out.

Never have more than 300 gold during the level.

Finish the tutorial.

Die without killing anyone.

Upgrade Aspen tower to the max.

Don't die once during the level.

Build 8 towers in a single level.

Kill red monster of every kind using the sword.

Kill 3 monsters with one sword slash.

Kill 4 monsters with one sword slash.

Spend 20 hours in the game.

Kill 10 000 monsters.

Get hit by Red Lord

Die at 10th wave.

Discover the secret combo.