Games like Hell of a Birthday
Games like Hell of a Birthday include MiSide, The Exit 8, Escape the Backrooms, Firewatch, and The Cabin Factory. We matched them by the tags players give Hell of a Birthday on Steam (Adventure, Casual, Interactive Fiction, Walking Simulator, and Immersive Sim): closest matches first, and among equally close ones the better-known games.

MiSide
Shared: Cute · 3D · First-Person

The Exit 8
Shared: Walking Simulator · Immersive Sim · Horror

Escape the Backrooms
Shared: Horror · Adventure · First-Person

Firewatch
Shared: Adventure · Walking Simulator · First-Person

The Cabin Factory
Shared: Walking Simulator · Adventure · Immersive Sim

Slime Rancher
Shared: Adventure · Cute · First-Person

The Death | Thần Trùng
Shared: Adventure · Casual · Horror

Fears to Fathom® - Scratch Creek
Shared: Adventure · Casual · Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · Interactive Fiction

Florence
Shared: Casual · Adventure · Interactive Fiction

Fears to Fathom - Woodbury Getaway
Shared: Adventure · Casual · Walking Simulator

Spooky's Jump Scare Mansion: HD Renovation
Shared: Adventure · Horror · Cute

Outlast
Shared: First-Person · Horror · Adventure

Five Nights at Freddy's: Security Breach
Shared: Horror · Adventure · First-Person

Slime Rancher 2
Shared: Cute · Adventure · Casual

Poppy Playtime
Shared: Horror · First-Person · Adventure

Scanner Sombre
Shared: Walking Simulator · Adventure · Horror

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

The Beast Inside
Shared: Adventure · Horror · First-Person

Blair Witch
Shared: Adventure · Horror · First-Person

Garten of Banban
Shared: Horror · First-Person · 3D

The Hat Man: Shadow Ward
Shared: Adventure · Horror · First-Person

Berry Bury Berry
Shared: 3D · First-Person · Casual

Before Your Eyes
Shared: Interactive Fiction · Adventure · Walking Simulator