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