Games like Millennium Atoll
Games like Millennium Atoll include SANABI, INSIDE, Atomic Heart, Resident Evil 4, and Little Nightmares II. We matched them by the tags players give Millennium Atoll on Steam (Action, Adventure, Action-Adventure, 2D Platformer, and Horror): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · Adventure · 2D Platformer

INSIDE
Shared: 2.5D · Horror · Adventure

Atomic Heart
Shared: Adventure · Action · Action-Adventure

Resident Evil 4
Shared: Action · Horror · Dark

Little Nightmares II
Shared: Adventure · Horror · Dark

STAR WARS Jedi: Survivor™
Shared: Action · Adventure · Action-Adventure

Tomb Raider Game of the Year
Shared: Action · Adventure · Action-Adventure

Half-Life 2
Shared: Action · Adventure · Sci-fi

Resident Evil Requiem
Shared: Action · Horror · Action-Adventure

Rise of the Tomb Raider™
Shared: Action · Adventure · Action-Adventure

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · Action · Horror

Bendy and the Dark Revival
Shared: Action · Horror · Adventure

PRAGMATA
Shared: Action · Adventure · Action-Adventure

Darkwood
Shared: Adventure · Action · Horror

DARQ: Complete Edition
Shared: Adventure · Horror · Dark

REPLACED
Shared: Side Scroller · Action-Adventure · 2.5D

Well Dweller
Shared: Action-Adventure · Action · Horror

God of War Ragnarök
Shared: Action · Adventure · Action-Adventure

Prince of Persia The Lost Crown
Shared: Action · 2D Platformer · Adventure

Warhammer 40,000: Space Marine 2
Shared: Action · Adventure · Action-Adventure

Five Nights at Freddy's: Security Breach
Shared: Horror · Adventure · Action

Marvel’s Spider-Man Remastered
Shared: Action · Adventure · Action-Adventure

Black Myth: Wukong
Shared: Action · Action-Adventure · Adventure

A Plague Tale: Innocence
Shared: Adventure · Action · Horror