Here is the full list of all 42 Sentry Knight Tactics achievements.
Slay the Giant Chicken. Wait... Giant Chicken?
Recruit the Rogue into your party.
Complete Act I on Normal or Hardcore difficulty.
Complete Act II on Normal or Hardcore difficulty.
Complete Act III on Normal or Hardcore difficulty.
Complete the game on Hardcore Mode.
Recruit the Witch into your party.
Recruit the Shaman into your party.
Recruit the Archer into your party.
Recruit the Warlock into your party.
Reach Level 20 during your journey.
Upgrade any piece of equipment to a Legendary rarity.
Find a Legendary item inside of a loot bag.
Equip a single Hero with both a Legendary Weapon and a Legendary Armor.
Slay 1,000 monsters during a single journey.
Complete at least 30 Quests during a single journey.
Survive any battle while at least one of your other Heroes is dead.
Spend a total of 25,000 Gold at shopkeeps during a single journey.
Decide the mage convict's fate in Eriford.
Seal the Portal that rips through Stonewynn.
Seal the Portal that rips through Bellcoast.
Seal the Portal that rips through Eriford.
Complete all three bounties in Stonewynn.
Assemble all three pieces of the Legendary Weapon.
Party in the Rave Cave.
Slay every Elite monster variant at least once during a single journey.
Slay Advasma with every Hero.
Inflict 500 Damage Over Time effects on your foes during a single journey.
Speak to the various inhabitants of the world.
Find That One Ring during a single journey. It's precious!
Slay a chicken, sheep, rabbit and a pig during a single journey.
Complete every Quest, including all Side Quests, during your journey.
Open 5 Mysterious Lockboxes.
Not today. Complete a journey without suffering more than 5 party wipes.
Make sure the guardsman at The Netherworld entrance heads into the portal first. You're following close behind, right?
Help the sick villager in Glacier Gorge by crafting her a Curative Potion.
Clear out all of the caves in Bellcoast to help setup research teams within.
Reel in 25 fish during a single journey.
Obtain 15 Legendary items during a single journey.
Deal 1,000 damage in a single blow.
Find and use a Costume during your journey.
Find and summon a Companion during your journey.