Games like NightMare King
Games like NightMare King include Vampire Survivors, Megabonk, Brotato, Skul: The Hero Slayer, and The Binding of Isaac: Rebirth. We matched them by the tags players give NightMare King on Steam (Indie, Looter Shooter, Roguelike, Arena Shooter, and Singleplayer): closest matches first, and among equally close ones the better-known games.
Vampire Survivors
Shared: Indie · Pixel Graphics · Roguelike
Megabonk
Shared: Roguelike · Indie · Roguelite
Brotato
Shared: Roguelike · Singleplayer · Arena Shooter
Skul: The Hero Slayer
Shared: Indie · Roguelike · Pixel Graphics
The Binding of Isaac: Rebirth
Shared: Indie · Roguelike · Pixel Graphics
Halls of Torment
Shared: Roguelike · Pixel Graphics · Roguelite
Balatro
Shared: Roguelike · Singleplayer · Indie
Hades
Shared: Indie · Roguelike · Roguelite
Death Must Die
Shared: Pixel Graphics · Roguelite · Bullet Hell
Nuclear Throne
Shared: Roguelike · Indie · Pixel Graphics
Gunfire Reborn
Shared: Roguelike · Looter Shooter · Indie
Enter the Gungeon
Shared: Roguelike · Indie · Pixel Graphics
Magicraft
Shared: Looter Shooter · Roguelike · Roguelite
Dungreed
Shared: Roguelike · Indie · Pixel Graphics
Rogue Legacy
Shared: Indie · Roguelike · Singleplayer
Boneraiser Minions
Shared: Indie · Pixel Graphics · Bullet Hell
Risk of Rain 2
Shared: Roguelike · Looter Shooter · Action Roguelike
20 Minutes Till Dawn
Shared: Bullet Hell · Roguelite · Action Roguelike
Noobs Want to Live
Shared: Roguelike · Pixel Graphics · Bullet Hell
Asgard's Fall — Viking Survivors
Shared: Indie · Casual · Roguelike
Dead Cells
Shared: Roguelike · Pixel Graphics · Action Roguelike
Hades II
Shared: Roguelike · Roguelite · Action
Risk of Rain (2013)
Shared: Indie · Roguelike · Pixel Graphics
Loop Hero
Shared: Roguelike · Indie · Pixel Graphics