Here is the full list of all 155 Risk of Rain Returns achievements.
Kill the Scavenger.
Find the bloated survivor.
Complete the Providence Trial "Main Systems Offline". Alternatively: Defeat 3,000 enemies as HAN-D.
Complete the Providence Trial "Danger Orbits". Alternatively: Defeat 3,000 enemies as Artificer.
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 "Think of the Children".
Complete the Providence Trial "Uncontrolled Experiment". Alternatively: Defeat 3,000 enemies as Acrid.
Complete the Providence Trial "A Rung Above".
Complete the Providence Trial "Routine Maintenance".
Bank 20,000 gold.
Find the robot janitor.
Visit 10 unique stages.
Survive 40 minutes.
Engineer: Acquire a Beam Drone.
Engineer: Kill a boss in 15 seconds or less.
Acrid: Spread 3,300 feet of caustic sludge.
Acrid: Spread Epidemic to 25 enemies.
Complete the Providence Trial "Caustic Climb". Alternatively: Collect 300 items as Acrid.
Complete the Providence Trial "A Toxic Path".
Free the chained creature.
Loader: Travel 6,500 meters using the Hydraulic Gauntlet
Pilot: Kill 10 enemies without touching the ground or geysers.
Die 50 times.
Complete the Providence Trial "Colossal Lift". Alternatively: Complete 25 stages as Loader.
Complete the Providence Trial "Crash Landing". Alternatively: Defeat 3,000 enemies as Loader.
Complete the Providence Trial "Ruins of the Future". Alternatively: Collect 300 items as Loader.
Obtain 30 unique items in one playthrough.
Find the Artifact of Honor.
Pilot: Kill 30 enemies after launching them using Airstrike.
Complete the Providence Trial "Emergency Ejection".
Complete the Providence Trial "Juggling Priorities".
Complete the Providence Trial "Race to the Finish!". Alternatively: Collect 300 items as Pilot.
Collect 15 Monster Logs.
Complete the Providence Trial "Get Off My Lawn!".
Complete the Providence Trial "Drowning in Research". Alternatively: Defeat 3,000 enemies as Engineer.
Complete the Providence Trial "From All Angles". Alternatively: Complete 25 stages as Engineer.
Purchase 40 drones total.
Reach 650 health.
Complete the Providence Trial "Castle of Memories". Alternatively: Defeat 3,000 enemies as Bandit.
Complete the Providence Trial "Highway Robbery". Alternatively: Collect 300 items as Bandit.
Complete the Providence Trial "Endless Stand-Off". Alternatively: Complete 25 stages as Bandit.
Beat the 3rd stage.
Find this item hidden somewhere in the world to unlock it.
Survive a boss with less than 20% health.
Pass a shrine 4 times in a row.
Enforcer: Block 2000 damage total with your shield.
Complete the Providence Trial "Hot-Rope Hop".
Complete the Providence Trial "Blades in the Wind". Alternatively: Collect 300 items as Huntress.
Complete the Providence Trial "S.O.S.".
Complete the Providence Trial "Scavenger Hunt". Alternatively: Collect 300 items as Enforcer.
Complete the Providence Trial "Inner Demons".
Complete the Providence Trial "Specimen Sampling". Alternatively: Complete 25 stages as Enforcer.
Complete the Providence Trial "Brave Heart, Steady Hand". Alternatively: Complete 25 stages as Commando.
Complete the Providence Trial "Slide to the Finish!". Alternatively: Defeat 3,000 enemies as Commando.
Complete the Providence Trial "Piercing Space and Time". Alternatively: Defeat 3,000 enemies as Huntress.
Complete the Providence Trial "A Colossal Feat". Alternatively: Collect 300 items as Commando.
Kill the Magma Worm, Wandering Vagrant, and Colossus.
Unlock a survivor.
Huntress: Achieve 200% attack speed.
Fail a shrine 3 times in a row.
Commando: Dodge 7 lethal attacks.
Have 4 drone helpers at once.
Complete the 1st stage in under 5 minutes.
Defeat 20 Lemurians in one playthrough.
Level up to level 20.
Get a gold rank on at least 5 Providence Trials.
Huntress: Defeat the Ancient Wisp without taking damage.
Kill 12 enemies simultaneously using the Gold-Plated Bomb.
Bandit: Kill a boss with 'Lights Out.'
Bandit: Reset your cooldown 15 times consecutively.
Survive in lava for 1 minute straight.
End a Teleporter timer with 0 enemies on the map.
Use the same Equipment Activator 5 times.
Enforcer: Stay in Shield Mode for 5 minutes straight (in combat).
HAN-D: Kill 10 enemies simultaneously with FORCED_REASSEMBLY.
HAN-D: Beat the third stage without falling below 60% health.
Engineer: Detonate 15 Bounding Mines within 5 seconds.
Clear a path for the survivor.
Miner: Survive the teleporter event without falling below 50% health.
Miner: Reach level 10 without getting hurt more than once.
Beat the game.
Sniper: Achieve 15 consecutive perfect reloads.
Sniper: 1-shot kill 10 enemies consecutively.
Obtain 7 Monster Teeth and 1 Guardian Heart.
Unlock a golden chest with the Explorer's Key.
Reach max barrier.
Deal 5000 damage in one shot.
Drown 20 Whorls.
Collect 4 Keycards.
Use a health shrine that drops you below 5% health.
Mercenary: Beat the game on Monsoon difficulty.
Beat the game 5 times.
Mercenary: Eviscerate 50 enemies.
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: 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: Beat the third stage without any players collecting items or equipment.
Sniper: Kill Providence while backflipping.
Drifter: Get 20 temporary items at once.
Huntress: Defeat 3 unique event bosses in one run.
Artificer: Multi-kill 15 enemies.
Recycle 6 drones in one playthrough.
Complete the Providence Trial "Go On Without Me". Alternatively: Defeat 3,000 enemies as Enforcer.
Find the illegal shipment.
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 "Shadows of the Past". Alternatively: Defeat 3,000 enemies as Mercenary.
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".
Complete the Providence Trial "Meteor Showers".
Complete the Providence Trial "Lone Wolf".
Complete the Providence Trial "Bullseyes Only". Alternatively: Complete 25 stages as Sniper.
Complete the Providence Trial "A Duplicator?!".
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 "Break the Targets!". Alternatively: Complete 25 stages as Miner.
Kill 8 Elder Lemurians without losing your Scorching status.
Complete the Providence Trial "Scorching Heart". Alternatively: Collect 300 items as Miner.
Complete the Providence Trial "Gup Sorting?".
Find the Artifact of Kin.
Find the Artifact of Distortion.
Find the Artifact of Spite.
Find the Artifact of Glass.
Find the Artifact of Enigma.
Find the Artifact of Sacrifice.
Find the Artifact of Command.
Find the Artifact of Spirit.
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 Tempus.
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.