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