Games like Random Chaos Dungeon
Games like Random Chaos Dungeon include Hero Siege, Vampire Survivors, Sephiria, Monster Hunter: World, and Enter the Gungeon. We matched them by the tags players give Random Chaos Dungeon on Steam (Action Roguelike, Action, RPG, Abstract, and 2D): closest matches first, and among equally close ones the better-known games.

Hero Siege
Shared: Action Roguelike · RPG · Co-op

Vampire Survivors
Shared: Action Roguelike · 2D · Action

Sephiria
Shared: Action Roguelike · Co-op · Action

Monster Hunter: World
Shared: Co-op · Action · RPG

Enter the Gungeon
Shared: Action Roguelike · Co-op · Pixel Graphics

Death Must Die
Shared: Action Roguelike · RPG · Action

Streets of Rogue
Shared: Action Roguelike · RPG · Action

Risk of Rain 2
Shared: Action Roguelike · Co-op · Action

Risk of Rain (2013)
Shared: Action Roguelike · Action · Co-op

Skul: The Hero Slayer
Shared: Action · Action Roguelike · 2D

Heroes of Hammerwatch II
Shared: Action Roguelike · RPG · Action

Rogue Legacy
Shared: Action Roguelike · Action · 2D

Heroes of Hammerwatch
Shared: Action Roguelike · Co-op · RPG

Ravenswatch
Shared: Action Roguelike · Co-op · Action

Halls of Torment
Shared: Action Roguelike · Action · RPG

暖雪 Warm Snow
Shared: Action Roguelike · 2D · RPG

Nuclear Throne
Shared: Action Roguelike · Action · Pixel Graphics

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · 2D

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · 2D

UnderMine
Shared: Action Roguelike · RPG · Action

Roguelands
Shared: Action Roguelike · RPG · Action

Dungreed
Shared: Action Roguelike · Action · 2D

Magicite
Shared: RPG · Action Roguelike · 2D

Rogue Heroes: Ruins of Tasos
Shared: Co-op · RPG · Action