The Couch Co-Op Update Title update for Infernax has 12 achievements.
Purchase the Squire his first tool
Purchase an Evil tool for the Squire
Parade your Duke in any village
Fully upgrade all the Squire's tools
Block a projectile with the Squire's shield on the ground
Eat. the. wall. chicken.
Take a shortcut to Stormheim Castle's chest
Make the Mayor work his core
Sleep until you can't sleep no more
Turn around and take the boat
Play a game with a friend... with guns...
Complete a game with a friend