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