No missable achievements (plus 35 unknown)
Sign in with Steam or Xbox to track your progress, and:
Do any description of anything.
Kill 30 chickens.
Deploy 100 scourge.
Kill 30 Pigs.
Kill 50 Lumbros.
Issue 10 orders to your summons.
Summon 30 Horrors.
Pull 50 enemies with the Outcast's chain.
Kill 10 Mushroomheads.
Throw 50 healing vials.
Issue 50 orders to your summons.
Defeat Mayor Biscuit without dying.
Kill 35 Townie Elites.
Summon 30 Darkseeds.
Kill 35 Witches.
Kill 50 basic Townies.
Issue 150 orders to your summons.
Smack 50 enemies with the Grimm Keeper's skull bag.
Kill 35 Zealots.
Summon 30 Punges.
Issue 250 orders to your summons.
Kill 35 Hunters.
Defeat the Citadel stage without dying.
Beat the campaign without using any Trinkets.
Issue 500 orders to your summons.
Beat the campaign with the Outcast Powerset.
Beat the campaign with the Grimm Keeper Powerset.
Beat the campain with the Alchemist Powerset.
Beat the campaign without dying.
Use 10 different trinkets in one campaign.
Beat the campaign without eating any animals.
Bestow the moniker of "Vance."
Beat the campaign without taking any Nekro upgrades...you dirty boy.
Find and befriend the Giant Flaming Bear.
Kill 35 Priests.