Win the first stage with 3 stars.
Help baldo sneak into the mountain.
Find all the armadillos
Destroy 3 mine carts before they reach their destination.
Help DK through the mines.
Get rid of those annoying pests and whack 5 Moles.
Slay 500 enemies.
Put Borney to sleep.
Melt the T-800.
Take the ring back from Bollum before it's too late.
Sell 20 towers.
Build 80 Towers.
Call 15 waves early.
Destroy 80 Chompbots.
Kill 13 Engineers before they can repair a Machine.
Find Scrooge McDuck.
Get 3 Stars in every Stage of the Dwarven Kingdom.
Defeat Bolgur, Lord of the Dwarves.
Make the horn whisper a song
Hire 5 Trolls
Find the secret agents
Find Olav the magical iceman
Fend off the Draugrs
Slay 300 Draugrs
Slay 3000 enemies.
Spawn 1,500 Reinforcements.
Break the ice from 25 frozen towers
Help Bonehart to come back
Defeat Jokull, mother of Wyverns
Get 3 stars in every stage of the Frozen North
Reach level 10 with Veruk.
Reach level 10 with Asra.
Reach level 10 with Oloch.
Kill Leeroy Jenkins' brother.
Destroy the farmer's crops
Find the Gommi Bears
Spawn 200 Spiderlings
Turn off all the streetlamps
Find the hidden Root
Hire 50 mercenaries
Defeat Denas, King of Linirea
Get 3 stars in every stage of the Kingdom of Linirea
Slay 10,000 enemies.
Kill 5,000 enemies with Vez'nan's powers.
Make your crows deal 30000 total damage
Teleport 666 enemies with the infernal mages
Summon 50 captain orcs
Launch 500 Nitro powered Rocket riders
Execute 81 enemies with the chainsaw sword
Great Scott! Burn 88 Presto logs and reach maximum speed!
Summon 13 Gargoyles
Kill 200 enemies with the bee hives
Spawn 500 skeleton warriors to battle
Make elite harassers dodge 800 attacks
Deal a total of 5000 damage with the basic attack of orc shamans
Win all the Iron mode campaign challenges
Win all the Heroic mode campaign challenges
Complete the Campaign in Veteran difficulty.
Complete the Campaign in Impossible difficulty.
Make Kermit take a sip of tea.
Find the hypnotoad and obey.
Make the frog cross the road.
Defeat Polyx the Wise
Find the First Avenger.
Find out why the dog is barking.
Help the yeti have a decent meal.
Defeat the Winter Queen of the Frozen North.
Find Slenderman, the old-fashioned horror creature.
Sink the girl in the Black Lagoon.
Collect the five pieces of Lord Blackburn's armor.