Here is the full list of all 41 Krater achievements.
Kill ElectroBert
Kill Cortex
Reach level 45 in the dungeon Limbo
Complete “Stark raving mad” quest
Equip three Healing boosters in a Slayer's Perforate ability.
Complete the “The Wretched Hive” quest
Equip three Defense booster in a Medikus' Heal ability.
Equip one Strength booster in a Medikus' Nano Stream ability.
Equip one Slow booster in a Medikus' Healing orb ability.
Equip one Slow booster in a Regulator's Tag ability.
Equip one Slow booster in a Bruiser's Cleave ability.
Defeat Bloodclot
Defeat Bloodclot in hardcore mode
Kill Roger and his pet
Amass a fortune of 100000 kr
Discover 40 locations
Recruit Yimmie
Visit Frisktorp
Join a coop mission
Equip one Strength booster in a Slayer's Lacerate ability.
Equip three Damage boosters in a Medikus' Healing Orb ability.
Equip three Healing boosters in a Bruiser's Stomp ability.
Equip one Stamina booster in a Regulator's Area slow ability.
Equip three Damage boosters in a Regulator's Area slow ability.
Equip three Damage boosters in a Bruiser's Stomp ability.
Equip three Healing boosters in a Regulator's Area slow ability
Visit Solside City
Discover 30 locations
Recruit a mutant Regulator
Recruit a mutant Bruiser
Visit Westerfall
Kill 8 enemies in 10 seconds
Reach rank 15
Discover 20 locations
Discover 10 locations
Recruit a Character
Recruit a mutant Medikus
Craft an item
Use Team Management
Kill 10 Vildhunds
Complete the Tutorial