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