Games like A Day Without Me
Games like A Day Without Me include Mouthwashing, MiSide, Little Nightmares II, INSIDE, and Layers of Fear (2016). We matched them by the tags players give A Day Without Me on Steam (Horror, Walking Simulator, Action-Adventure, 2.5D, and Cute): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Horror · Story Rich · Psychological Horror

MiSide
Shared: Horror · Cute · Story Rich

Little Nightmares II
Shared: Horror · Story Rich · Puzzle

INSIDE
Shared: 2.5D · Horror · Story Rich

Layers of Fear (2016)
Shared: Horror · Walking Simulator · Psychological Horror

Sally Face - Episode One
Shared: Horror · Story Rich · Psychological Horror

Fran Bow
Shared: Horror · Story Rich · Psychological Horror

Little Nightmares
Shared: Horror · Story Rich · Adventure

Firewatch
Shared: Walking Simulator · Story Rich · Horror

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Story Rich

What Remains of Edith Finch
Shared: Walking Simulator · Story Rich · Adventure

SOMA
Shared: Horror · Story Rich · Psychological Horror

The Exit 8
Shared: Walking Simulator · Horror · Puzzle

Detention
Shared: Horror · Psychological Horror · Story Rich

INDIKA
Shared: Horror · Surreal · Story Rich

Bendy and the Ink Machine
Shared: Horror · Puzzle · Cartoony

Layers of Fear 2 (2019)
Shared: Horror · Walking Simulator · Psychological Horror

Poppy Playtime
Shared: Horror · Puzzle · Psychological Horror

Garten of Banban
Shared: Horror · Psychological Horror · Walking Simulator

Amnesia: Rebirth
Shared: Action-Adventure · Horror · Story Rich

The Bunny Graveyard
Shared: Horror · Action-Adventure · Cute

Still Wakes the Deep
Shared: Horror · Walking Simulator · Psychological Horror

DISTRAINT 2
Shared: Horror · Story Rich · Psychological Horror

Hellblade II: Senua’s Saga
Shared: Action-Adventure · Story Rich · Psychological Horror