Games like Nine Skies
Games like Nine Skies include Vampire Survivors, Hades, Megabonk, Hades II, and Brotato. We matched them by the tags players give Nine Skies on Steam (Strategy, Roguelike, Roguelite, Indie, and Action Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Roguelite · Action Roguelike · Indie

Hades
Shared: Roguelite · Action Roguelike · Indie

Megabonk
Shared: Roguelike · Roguelite · Action Roguelike

Hades II
Shared: Roguelike · Roguelite · Action

Brotato
Shared: Roguelike · Singleplayer · Action Roguelike

Skul: The Hero Slayer
Shared: Indie · Roguelike · Action Roguelike

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Indie

Balatro
Shared: Roguelike · Strategy · Singleplayer

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Singleplayer

Halls of Torment
Shared: Roguelite · Action Roguelike · Roguelike

Death Must Die
Shared: Roguelite · Action Roguelike · Roguelike

Nuclear Throne
Shared: Roguelike · Action Roguelike · Indie

Dungreed
Shared: Roguelike · Action Roguelike · Roguelite

Rogue Legacy
Shared: Roguelike · Indie · Action Roguelike

The Binding of Isaac
Shared: Roguelike · Action Roguelike · Indie

Sephiria
Shared: Roguelike · Roguelite · Action Roguelike

Everything is Crab: The Animal Evolution Roguelite
Shared: Strategy · Action Roguelike · Roguelite

Gunfire Reborn
Shared: Roguelike · Roguelite · Indie

BALL x PIT
Shared: Roguelite · Roguelike · Action

Enter the Gungeon
Shared: Roguelike · Action Roguelike · Indie

Dead Cells
Shared: Roguelike · Action Roguelike · Roguelite

Asgard's Fall — Viking Survivors
Shared: Roguelite · Action Roguelike · Indie

Streets of Rogue
Shared: Roguelite · Action Roguelike · Roguelike

Soulstone Survivors
Shared: Roguelite · Action Roguelike · Roguelike