Complete twelfth wave

Complete tenth wave

Complete eight wave

Complete sixth wave

Complete fourth wave

Complete second wave

Complete your first wave

Destroy the first Boss

Destroy 48 enemies

Destroy 45 enemies

Destroy 42 enemies

Destroy 39 enemies

Destroy 36 enemies

Destroy 33 enemies

Destroy 30 enemies

Destroy 27 enemies

Destroy 24 enemies

Destroy 21 enemies

Destroy 18 enemies

Destroy 15 enemies

Destroy 12 enemies

Destroy 9 enemies

Destroy 6 enemies

Destroy 3 enemies

Destroy your first enemy

Buy your tenth upgrade

Buy your ninth upgrade

Buy your eight upgrade

Buy your seventh upgrade

Buy your sixth upgrade

Buy your fifht upgrade

Buy your fourth upgrade

Buy your third upgrade

Buy your second upgrade

Buy your first upgrade