Here is the full list of all 67 Incursion The Thing achievements.
Get 3 gems on the Gorge Bridge stage without recruiting archers and wizards.
Defeat Pharon'Ahn.
Survive until reinforcements arrive on the Sarensland Gates stage.
Bash 100 enemies with Doomhammers.
Let the Worm eat your troops on the Worm Valley stage.
Level up any hero to max level.
Defeat Rooltuk, the underground king.
Train 15 ninjas.
Hire the Potbellied Demon on the Dragon Cave stage.
Kill the Broodmother, the cave defender.
Get the Machine Gun unlocked.
Level up any hero to level 15.
Defeat the Great Ice Elemental, one of the keepers of the rune.
Complete the Trap stage without any Ent death.
Train 5 healers.
Let the Worm eat 20 units of your army on the Habitat of Troll stage.
Complete the Habitat of Troll stage without losing any warriors to the Troll.
Cast the Targa Storm spell 4 times.
Change the location of your warriors 300 times.
Let RED exchange souls with other units 40 times.
Train 20 eleven archers.
Kill 50 Poisonous Worms.
Get RED to level 10.
Get 50 gems.
Defeat Pharon'Ahn in the first battle.
Prevent Petyan Gaz from ressurecting on the Tomb of Petyn Gaz stage.
Kill 5,000 enemies.
Train 20 units with splash damage.
Get the Flying Pet in your order.
Complete 5 levels with the highest rating.
Get 20 gems.
Kill 2,000 enemies.
Cast 30 spells.
Complete any stage using all barracks.
Defeat Ettyr.
Let your troops be reborn 200 times.
Cast 10 spells.
Stop 500 enemies.
Get the Pet in your order.
Train 100 basic units.
Get RED unlocked.
Advance 10 waves early.
Reach Targa's level.
Stop 100 enemies
Complete a level with the highest rating.
Advance 5 waves early.
Kill Petyan Gaz.
Complete the 29 main levels.
Complete the 29 main levels on the highest rating.
Get 3 gems on the Encounter stage using only hero forces.
Defeat Xyllos, the last shadow demon.
Get Targa to level 10.
Complete the Artifact level without losing a sage.
Complete the Worm Valley stage without losing any warriors to the Worm.
Keep the gates undestroyed on the Sarensland Gates stage.
Defeat The Thing, the leader of darkness.
Jump 100 times using the Teleportation Sphere.
Use the Necromancer to raise 100 skeletons.
Get 100 enemies Hexed by Puppet Master.
Possess Bychara using Puppet's Creep Control.
Use Ginny Gun of Wishes 30 times.
Cast the spell Freeze the World.
Let Twoface create 200 illusions.
Let 50 Lightning Beasts be summoned by Archmages.
Let Blademasters cause 100 Critical Strikes.
Let the Tentacle eat any Hero on a Dried-up Lake stage.
Complete the Trap stage without any hero dieing.