Kill all flying units in a world using only kitten units.

Create a world which is symmetrical along both axes.

Create a chess layout in an 8x8 world.

Create a sudoku layout in a 9x9 world.

Build a barracks in 15 minutes.

Chop for wood 1000 times.

Mine for stone 1000 times.

Build 10 quarries in a world.

Clear a world using only imps.

Clear a world using only mages.

Sacrifice 666 units.

Amass 100,000 blood.

Summon 30 succubi through the blood portal.

Kill three enemies in a row with fire units.

Lose a fight.

Lose two fights.

Win a fight with < 50% odds of victory.

Perform a x5 attack on a unit.

Kill a unit with less than 2% chance of success.

Buy all the music in the shop.

Have a fight where no units hit 25 times in a row.

Clear a world without training any farmers.

Have 2 units saved by the saving dice in a world.

Train 100 scholars in a world.