Here is the full list of all 33 RUINER achievements.
Die 666 times
Acquire all outfits
Finish Speedrun
Finish Arena:Colosseum
Score more than 50000 points in Arena:Colosseum
Beat the game on Hard Difficulty
Beat the game on Normal Difficulty
Burn 420 enemies with flamethrower
Use dash 9001 times
Finish NewGame+
Kill all Angels
Destroy all dead Hosts' piles
Hit 50 mines with your melee weapon
Unlock all iChing fortunes
Kill 75 enemies with a shield ram
Hack 50 enemies
Do 1003 pushups
Complete CATS quest
Finish Epilogue
Beat the game without dying
Beat the game on Easy Difficulty
Defeat Sisters
Kill 3 enemies with a one explosion
Collect all bounties
Destroy Angel core in the air
Achieve 15 kills combo
Defeat TrafficKing
Acquire all basic abilities
Reflect 100 bullets with your shield
Destroy 3 Angel cores in one go
Perform 50 Ruiner kills
Defeat Nerve
Finish Prologue