Spuds Unearthed

Upgrade

Upgrade a Spud

Mechanic

Unlock a new turret combination

Rotten Potatoes

Win a fight against Zombuds

Conqueror

Conquer another player's planet

Tough one

Conquer a hard Zombud planet

Engineer

Unlock all turret combinations

Gotta grow them all

Unlock all Spuds

Harvest time

Reach 100 Spud population

Batatas

Upgrade all Spuds to maximum level