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