Here is the full list of all 69 RIPOUT achievements.
Equip any item
Craft any weapon mod at the Crafting station
Attack and kill an enemy with your and your teammates' Petgun!
Activate three enhancements while exploring one Derelict ship
Kill an enemy with a Ripout!
Let your Petgun Ripout any part of a mutant!
Command your pet to grab any critter and attach it
Kill a Mutant
Start your first mission in co-op
Complete the Tutorial
Reset the campaign for the first time
Craft any support mod for the Petgun at the Crafting station
Craft any garment at the Crafting station
Show your craftsmanship and create five items of any sort
Show your dedication and create ten items of any kind
Resurrect your teammate
Pick up the revive token from the resurrection station
Deal 5000 damage to enemies in a single derelict ship run
Kill an enemy with the Axe
Equip three support mods on the Petgun
Electrify yourself 100 times
Destroy 100 enemy weak spots across the campaign
Unlock five weapons schematics
Find ten support mods schematics
Craft 25 items of any kind
Fly the Hubship into a wormhole and reach the second sector
Fly the Hubship into a wormhole and reach the third sector
Fly the Hubship into a wormhole and reach the fourth sector
Equip one completely new shiny garment set
Use the Petgun to hack an enemy
Use an attached Claw critter to kill a mutant
Destroy 200 enemy weak spots across the campaign
Complete a derelict mission with the Shotgun equipped
Complete a derelict mission with the Long Gun equipped
Complete a derelict mission with the Laser Gun equipped
Complete a derelict mission with the Rocket Launcher equipped
Complete a derelict mission with the Grenade Launcher equipped
Complete a derelict mission with the Flamethrower equipped
The main questline was completed
Beat the Boss in Singleplayer mode
Beat the Boss in Co-Op mode
Beat the Boss on Hard difficulty in Singleplayer mode
Beat the Boss on Hard difficulty in Co-Op mode
Three players are still alive and kicking when the boss is defeated
Craft 50 items
Collect every Collectible
Collect all garments
Collect all weapons
Collect all weapon support mods
Destroy 500 enemy weak spots across the campaign
Complete a derelict mission with the Gamma Fury equipped
Start your first mission
Beat the Boss 10 times
Collect all Mark 2 weapon mods
Collect all Mark 3 weapon mods
Craft First Mark 2 weapon
Craft First Mark 3 weapon
Kill 100 Heavy Mutants
Kill 100 Swarmers
Kill 100 Soldiers
Kill 100 Zombies
Kill 100 Rangers
Kill 100 Spaceman
Kill 100 Evaders
Kill 100 Modulators
Jump to Sector 2 in co-op
Jump to Sector 3 in co-op
Jump to Sector 4 in co-op
Kill 100 Bulwarks