ATOS Tier System: Normal: Tier 1: Easy Tier 2: Simple Tier 3: Medium Tier 4: Moderate Tier 5: Hard Tier 6: Difficult Tier 7: Challenging Tier 8: Intense Tier 9: Remorseless Tier 10: Relentless Soul Crushing: Tier 11: Insane Tier 12: Extreme Tier 13: Traumatising Tier 14: Terrifying Tier 15: Catastrophic Life Ending: Tier 16: Horrific Tier 17: Demanding Tier 18: Unreal Off Chart: Tier 19: Vengeful Tier 20: Vindictive
