Here is the full list of all 51 Miasma Chronicles achievements.
Recruit Bha Madhi.
Set 3 enemies on fire at the same time with a Napalm Deathcan.
Save the town from the Miasma.
Collect 4 types of Miasma.
Kill 10 Mimics.
Kill Dick Charlsen.
Kill Tragul.
Kill 20 Whisperer adults or saplings.
Silently kill 15 enemies.
Kill 20 Thievers.
Recruit Jade.
Collect the Miasma Vortex.
Kill 20 Frog Monsters.
Successfully complete your first tactical encounter.
Collect all Miasma types.
Recruit mayor Mason.
Unlock all enemy codex entries.
Collect every treasure.
Complete the codex.
Complete all side quests.
Kill your first collector.
Kill 10 collectors.
Kill 20 Robots.
Defeat Quendyl Zen.
Defeat Diesel D.
Complete the game in any difficulty.
Complete the game in 'Alpha Editor' difficulty.
Complete the game in 'Full Tactical' mode.
Complete the game on 'Alpha Editor' difficulty with 'Full Tactical' mode enabled.
Meet all of the Watchers.
Kill Matt Kain.
Win the Gauntlet.
Access the First Factory.
Reach Level 25.
Shrink, burn, and inflict acid damage to an enemy at the same time.
Kill 5 enemies with one action.
Kill an enemy with a bouncer after bouncing off a friend.
Push an enemy into a burning or acid area with a Knockback Grenade.
Kill a Mimic Shadow with the character that it is mimicking.
Kill 4 enemies with Overwatch in the same turn.
Kill an enemy with fall damage.
Kill 5 enemies with a single frag grenade.
Kill a Whisperer with a Sapling Grenade.
Kill 5 enemies with direct damage from a single shotgun blast.
Kill 5 enemies with an Assault Rifle without reloading.
Steal 250 plastic during a single combat encounter.
Kick the ball into the goal.
Speak to all the Originals robots.
Enter Club 14 with custom outfits assigned to all party members.
Give a helping hand.
Counterpunch a Counterpunch.