Here is the full list of all 155 Risk of Rain Returns achievements.
Mercenary: Beat the game on Monsoon difficulty.
Reach max barrier.
Complete the Providence Trial "Shadows of the Past". Alternatively: Defeat 3,000 enemies as Mercenary.
Find the Artifact of Honor.
Enforcer: Block 2000 damage total with your shield.
Mercenary: Eviscerate 50 enemies.
Huntress: Defeat 3 unique event bosses in one run.
Complete the Providence Trial "Uncontrolled Experiment". Alternatively: Defeat 3,000 enemies as Acrid.
Complete the Providence Trial "Crash Landing". Alternatively: Defeat 3,000 enemies as Loader.
Complete the Providence Trial "Danger Orbits". Alternatively: Defeat 3,000 enemies as Artificer.
Complete the Providence Trial "Inner Demons".
Complete the Providence Trial "A Rung Above".
Complete the Providence Trial "Break the Targets!". Alternatively: Complete 25 stages as Miner.
Complete the Providence Trial "Gup Sorting?".
Complete the Providence Trial "Don't Think, Feel". Alternatively: Complete 25 stages as Mercenary.
Complete the Providence Trial "Assassination Contract". Alternatively: Collect 300 items as Mercenary.
Complete the Providence Trial "Colossal Lift". Alternatively: Complete 25 stages as Loader.
Complete the Providence Trial "Ruins of the Future". Alternatively: Collect 300 items as Loader.
Complete the Providence Trial "Lightning Strikes Twice". Alternatively: Complete 25 stages as Artificer.
Complete the Providence Trial "In the Clouds". Alternatively: Collect 300 items as Artificer.
Complete the Providence Trial "Perilous Descent". Alternatively: Collect 300 items as Drifter.
Complete the Providence Trial "Equivalent Exchange". Alternatively: Complete 25 stages as Drifter.
Complete the Providence Trial "A Duplicator?!".
Beat the game 5 times.
Recycle 6 drones in one playthrough.
Bandit: Reset your cooldown 15 times consecutively.
Sniper: Beat the third stage without any players collecting items or equipment.
Complete the Providence Trial "Caustic Climb". Alternatively: Collect 300 items as Acrid.
Acrid: Spread Epidemic to 25 enemies.
Complete the Providence Trial "Go On Without Me". Alternatively: Defeat 3,000 enemies as Enforcer.
Complete the Providence Trial "Scavenger Hunt". Alternatively: Collect 300 items as Enforcer.
Complete the Providence Trial "Race to the Finish!". Alternatively: Collect 300 items as Pilot.
Complete the Providence Trial "Juggling Priorities".
Complete the Providence Trial "Emergency Ejection".
Unlock a golden chest with the Explorer's Key.
Engineer: Acquire a Beam Drone.
Engineer: Detonate 15 Bounding Mines within 5 seconds.
Clear a path for the survivor.
Find the Artifact of Spite.
Find the Artifact of Spirit.
Survive in lava for 1 minute straight.
Level up to level 20.
Use the same Equipment Activator 5 times.
Kill the Scavenger.
Find the bloated survivor.
Sniper: Achieve 15 consecutive perfect reloads.
Die 50 times.
Deal 5000 damage in one shot.
Complete the Providence Trial "Bullseyes Only". Alternatively: Complete 25 stages as Sniper.
Complete the Providence Trial "Lone Wolf".
Complete the Providence Trial "Meteor Showers".
Sniper: 1-shot kill 10 enemies consecutively.
Beat the game.
Bank 20,000 gold.
Survive 40 minutes.
Collect 4 Keycards.
Obtain 30 unique items in one playthrough.
Visit 10 unique stages.
Use a health shrine that drops you below 5% health.
Huntress: Achieve 200% attack speed.
Reach 650 health.
Find the Artifact of Command.
Find this item hidden somewhere in the world to unlock it.
Engineer: Kill a boss in 15 seconds or less.
Complete the Providence Trial "Get Off My Lawn!".
Complete the Providence Trial "Drowning in Research". Alternatively: Defeat 3,000 enemies as Engineer.
Get a gold rank on at least 5 Providence Trials.
Complete the Providence Trial "From All Angles". Alternatively: Complete 25 stages as Engineer.
Purchase 40 drones total.
Complete the Providence Trial "Highway Robbery". Alternatively: Collect 300 items as Bandit.
Have 4 drone helpers at once.
Complete the Providence Trial "A Toxic Path".
Complete the Providence Trial "Endless Stand-Off". Alternatively: Complete 25 stages as Bandit.
Complete the Providence Trial "Specimen Sampling". Alternatively: Complete 25 stages as Enforcer.
Complete the Providence Trial "Castle of Memories". Alternatively: Defeat 3,000 enemies as Bandit.
Complete the Providence Trial "S.O.S.".
Complete the Providence Trial "Blades in the Wind". Alternatively: Collect 300 items as Huntress.
Complete the Providence Trial "Hot-Rope Hop".
Complete the Providence Trial "Piercing Space and Time". Alternatively: Defeat 3,000 enemies as Huntress.
Complete the Providence Trial "Slide to the Finish!". Alternatively: Defeat 3,000 enemies as Commando.
Complete the Providence Trial "Brave Heart, Steady Hand". Alternatively: Complete 25 stages as Commando.
Complete the Providence Trial "A Colossal Feat". Alternatively: Collect 300 items as Commando.
End a Teleporter timer with 0 enemies on the map.
Collect 15 Monster Logs.
Find the Artifact of Tempus.
Survive a boss with less than 20% health.
Bandit: Kill a boss with 'Lights Out.'
Pass a shrine 4 times in a row.
Fail a shrine 3 times in a row.
Beat the 3rd stage.
Kill the Magma Worm, Wandering Vagrant, and Colossus.
Complete the 1st stage in under 5 minutes.
Free the chained creature.
Unlock a survivor.
Defeat 20 Lemurians in one playthrough.
Commando: Dodge 7 lethal attacks.
Huntress: Defeat the Ancient Wisp without taking damage.
Kill 12 enemies simultaneously using the Gold-Plated Bomb.
Enforcer: Stay in Shield Mode for 5 minutes straight (in combat).
Find the robot janitor.
HAN-D: Kill 10 enemies simultaneously with FORCED_REASSEMBLY.
HAN-D: Beat the third stage without falling below 60% health.
Miner: Survive the teleporter event without falling below 50% health.
Miner: Reach level 10 without getting hurt more than once.
Acrid: Spread 3,300 feet of caustic sludge.
Obtain 7 Monster Teeth and 1 Guardian Heart.
Drown 20 Whorls.
Obtain Meat Nugget, Bustling Fungus, Sprouting Egg, Bitter Root and Foreign Fruit in one run.
CHEF: SEAR/FLAMBE 20 Sand Crabs
CHEF: Have 20 cleavers out at once.
Loader: Travel 6,500 meters using the Hydraulic Gauntlet
Loader: Kill the Overloading Magma Worm.
Commando: Activate the 3rd teleporter without being hurt once.
Acrid: Kill Acrid in less than 15 seconds.
HAN-D: Obtain a golden drone.
HAN-D: Kill 15 enemies at once using the Sawmerang.
Sniper: Kill Providence while backflipping.
Drifter: Get 20 temporary items at once.
Pilot: Kill 30 enemies after launching them using Airstrike.
Pilot: Kill 10 enemies without touching the ground or geysers.
Artificer: Multi-kill 15 enemies.
Find the illegal shipment.
Complete the Providence Trial "Main Systems Offline". Alternatively: Defeat 3,000 enemies as HAN-D.
Complete the Providence Trial "Think of the Children".
Complete the Providence Trial "Routine Maintenance".
Complete the Providence Trial "A Fresh Harvest". Alternatively: Collect 300 items as CHEF.
CHEF: Simultaneously kill 15 oiled enemies using SEAR/FLAMBE
Complete the Providence Trial "The Right Ingredients". Alternatively: Defeat 3,000 enemies as CHEF.
Complete the Providence Trial "Kited Blades".
Kill 8 Elder Lemurians without losing your Scorching status.
Complete the Providence Trial "Scorching Heart". Alternatively: Collect 300 items as Miner.
Find the Artifact of Kin.
Find the Artifact of Distortion.
Find the Artifact of Glass.
Find the Artifact of Enigma.
Find the Artifact of Sacrifice.
Find the Artifact of Origin.
Get a gold rank on at least 15 Providence Trials.
Find the 4 hidden Artifact Shards.
Find the Artifact of Cognation.
Complete the final Providence Trial as Artificer.
Complete the final Providence Trial as Drifter.
Complete the final Providence Trial as Acrid.
Complete the final Providence Trial as Huntress.
Complete the final Providence Trial as Commando.
Complete the final Providence Trial as Enforcer.
Complete the final Providence Trial as Bandit.
Complete the final Providence Trial as HAN-D.
Complete the final Providence Trial as Engineer.
Complete the final Providence Trial as Sniper.
Complete the final Providence Trial as Miner.
Complete the final Providence Trial as CHEF.
Complete the final Providence Trial as Mercenary.
Complete the final Providence Trial as Loader.
Complete the final Providence Trial as Pilot.