Here is the full list of all 28 Them's Fightin' Herds achievements.
Complete Arizona's Story Mode chapter.
Unlock all other achievements.
Obtain 100% of collectibles in Arizona's Story Mode chapter.
Stomp Paprika into orbit.
Stomp the Son of Deer painting to pop out a hat.
Complete the Story Mode prologue.
Begin Story Mode.
Complete Arcade mode with Shanty on Greenhorn or higher difficulty.
Complete all combo trials for Shanty.
Complete Arcade mode with Tianhuo on Greenhorn or higher difficulty.
Complete Arcade mode with all "starting 6" characters on Greenhorn or higher difficulty.
Complete all combo trials for Tianhuo.
Complete all combo trials for every "starting 6" character.
Complete Arcade mode with Pom on Greenhorn or higher difficulty.
Complete all combo trials for Pom.
Complete Arcade mode with Paprika on Greenhorn or higher difficulty.
Complete all combo trials for Paprika.
Complete Arcade mode with Oleander on Greenhorn or higher difficulty.
Complete all combo trials for Oleander.
Complete Arcade mode with Velvet on Greenhorn or higher difficulty.
Complete all combo trials for Velvet.
Complete Arcade mode with Arizona on Greenhorn or higher difficulty.
Complete all combo trials for Arizona.
Win 25 online matches.
Play 25 online matches.
Win 10 online matches.
Win 1 online match.
Play 1 online match.