Games like REBORN
Games like REBORN include The Forest, Slime Rancher, Firewatch, Subnautica, and Subnautica: Below Zero. We matched them by the tags players give REBORN on Steam (Adventure, Casual, Horror, Open World, and Singleplayer): closest matches first, and among equally close ones the better-known games.

The Forest
Shared: Horror · Adventure · Open World

Slime Rancher
Shared: Adventure · Open World · Singleplayer

Firewatch
Shared: Adventure · First-Person · Singleplayer

Subnautica
Shared: Horror · Open World · Adventure

Subnautica: Below Zero
Shared: Open World · Singleplayer · Horror

Slime Rancher 2
Shared: Open World · Singleplayer · Adventure

Sons Of The Forest
Shared: Open World · Horror · Adventure

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

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

Metro Exodus
Shared: Open World · Singleplayer · Horror

We Happy Few
Shared: Adventure · Open World · First-Person

Grand Theft Auto V Legacy
Shared: Open World · Adventure · First-Person

Fallout 4
Shared: Open World · Adventure · Singleplayer

Choo-Choo Charles
Shared: Horror · Open World · Singleplayer

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

Atomic Heart
Shared: Adventure · Singleplayer · Open World

Blair Witch
Shared: Adventure · Horror · First-Person

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

Outlast
Shared: Horror · First-Person · Singleplayer

Granny
Shared: Horror · Singleplayer · Adventure

The Long Dark
Shared: Open World · Adventure · Singleplayer

The Elder Scrolls IV: Oblivion Remastered
Shared: Open World · Adventure · Singleplayer

Ready or Not
Shared: Singleplayer · Horror · First-Person

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