Games like Burdock 2
Games like Burdock 2 include SOMA, Lethal Company, Inside the Backrooms, Layers of Fear (2016), and Poppy Playtime. We matched them by the tags players give Burdock 2 on Steam (Horror, Post-apocalyptic, Multiple Endings, Exploration, and Adventure): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Horror · Psychological Horror · Exploration

Lethal Company
Shared: Horror · First-Person · Exploration

Inside the Backrooms
Shared: Horror · Psychological Horror · Adventure

Layers of Fear (2016)
Shared: Horror · Psychological Horror · First-Person

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · First-Person

Outlast
Shared: Horror · First-Person · Psychological Horror

Outer Wilds
Shared: Exploration · Adventure · Horror

Endacopia
Shared: Horror · Adventure · Psychological Horror

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Backrooms: Escape Together
Shared: Horror · Psychological Horror · First-Person

Layers of Fear
Shared: Horror · Psychological Horror · Adventure

Little Nightmares
Shared: Horror · Adventure · Atmospheric

MOLE
Shared: Horror · Adventure · Psychological Horror

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

No, I'm not a Human
Shared: Horror · Psychological Horror · Multiple Endings

Fallout 4
Shared: Post-apocalyptic · Exploration · Adventure

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

Visage
Shared: Horror · Psychological Horror · First-Person

Darkwood
Shared: Horror · Adventure · Psychological Horror

Metro Exodus
Shared: Post-apocalyptic · Horror · First-Person

The Bridge Curse Road to Salvation
Shared: Horror · Exploration · First-Person

Sally Face - Episode One
Shared: Horror · Psychological Horror · Adventure

What Remains of Edith Finch
Shared: Exploration · Adventure · First-Person