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