Build 50 towers

Build 50 mines

Sell 50 towers

Kill 500 enemies with spells

Kill 1000 enemies

Kill 3 enemies with one spell

Make a complete improvement for 50 towers on the levels

Fully upgrade any tower in the store

Build 1000 towers

Sell 500 towers

[Invisible Threat]: Use the spell 200 times

[Invisible Threat]: Complete all levels to 3 stars

[Invisible Threat]: Pass level without spells

[Invisible Threat]: Kill 1500 enemies

[Invisible Threat]: Kill 5 enemies with one shot