Games like Nine Lives Deep
Games like Nine Lives Deep include Cult of the Lamb, Skul: The Hero Slayer, UnderMine, The Binding of Isaac: Rebirth, and Dead Cells. We matched them by the tags players give Nine Lives Deep on Steam (Action Roguelike, Action, Dungeon Crawler, 2D, and Adventure): closest matches first, and among equally close ones the better-known games.

Cult of the Lamb
Shared: Action Roguelike · Dungeon Crawler · Cute

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

UnderMine
Shared: Action Roguelike · Dungeon Crawler · Action

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

Dead Cells
Shared: Action Roguelike · Adventure · 2D

Hades
Shared: Action Roguelike · Action · Dungeon Crawler

Enter the Gungeon
Shared: Action Roguelike · Dungeon Crawler · 2D

Dungreed
Shared: Action Roguelike · Action · 2D

Vampire Survivors
Shared: Action Roguelike · 2D · Action

Ori and the Will of the Wisps
Shared: Action · Adventure · Singleplayer

OneShot
Shared: Cute · Atmospheric · Adventure

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

Wizard of Legend
Shared: Action Roguelike · Dungeon Crawler · Action

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

God of War
Shared: Action · Adventure · Singleplayer

Noita
Shared: Dungeon Crawler · 2D · Action Roguelike

Hades II
Shared: Action · Action Roguelike · Dungeon Crawler

Nobody Saves the World
Shared: Action · Dungeon Crawler · Adventure

Hollow Knight
Shared: 2D · Adventure · Atmospheric

Heroes of Hammerwatch II
Shared: Action Roguelike · Dungeon Crawler · Action

Stray
Shared: Adventure · Atmospheric · Cute

SULFUR
Shared: Action Roguelike · Dungeon Crawler · Singleplayer

Slime Rancher
Shared: Cute · Adventure · Colorful

Black Myth: Wukong
Shared: Action · Combat · Adventure