Games like Billy's Nightmare
Games like Billy's Nightmare include Enter the Gungeon, Dead Cells, The Binding of Isaac: Rebirth, Risk of Rain (2013), and The Binding of Isaac. We matched them by the tags players give Billy's Nightmare on Steam (Action, Adventure, Roguelike, Action Roguelike, and Shooter): closest matches first, and among equally close ones the better-known games.
Enter the Gungeon
Shared: Roguelike · Action Roguelike · Pixel Graphics
Dead Cells
Shared: Adventure · Roguelike · Action Roguelike
The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Pixel Graphics
Risk of Rain (2013)
Shared: Roguelike · Action Roguelike · Action
The Binding of Isaac
Shared: Roguelike · Action Roguelike · Action
Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelike
Streets of Rogue
Shared: Action Roguelike · Action · Roguelike
Children of Morta
Shared: Roguelike · Action Roguelike · Pixel Graphics
Wizard of Legend
Shared: Action Roguelike · Roguelike · Action
Vampire Survivors
Shared: Action Roguelike · Pixel Graphics · Roguelike
Risk of Rain 2
Shared: Action Roguelike · Roguelike · Action
Gunfire Reborn
Shared: Roguelike · Action · Online Co-Op
Ravenswatch
Shared: Roguelike · Action · Action Roguelike
Nuclear Throne
Shared: Roguelike · Action Roguelike · Action
Hero Siege
Shared: Action Roguelike · Pixel Graphics · Roguelike
Broforce
Shared: Action · Pixel Graphics · Co-op
Spelunky
Shared: Roguelike · Action Roguelike · Action
PEAK
Shared: Adventure · Online Co-Op · Co-op
Noita
Shared: Roguelike · Pixel Graphics · Action
Ember Knights
Shared: Action Roguelike · Pixel Graphics · Co-op
Sephiria
Shared: Action Roguelike · Roguelike · Action
Heroes of Hammerwatch
Shared: Action Roguelike · Pixel Graphics · Action
UnderMine
Shared: Action Roguelike · Action · Pixel Graphics
Risk of Rain Returns
Shared: Action Roguelike · Online Co-Op · Action