Games like Tiani
Games like Tiani include Firewatch, Five Nights at Freddy's: Secret of the Mimic, Hogwarts Legacy, Fallout 4, and PEAK. We matched them by the tags players give Tiani on Steam (Adventure, Action RPG, First-Person, Horror, and Exploration): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Atmospheric · First-Person

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · First-Person · Horror

Hogwarts Legacy
Shared: Adventure · Exploration · Fantasy

Fallout 4
Shared: Adventure · Exploration · First-Person

PEAK
Shared: Adventure · First-Person · Exploration

Lethal Company
Shared: First-Person · Horror · Exploration

Minecraft Dungeons
Shared: Adventure · Action RPG · Dungeon Crawler

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

Resident Evil 7 Biohazard
Shared: VR · Horror · First-Person

The Elder Scrolls IV: Oblivion Remastered
Shared: Adventure · First-Person · Action RPG

Grim Dawn
Shared: Action RPG · Hack and Slash · Dungeon Crawler

Half-Life: Alyx
Shared: VR · Horror · First-Person

Gothic 1 Remake
Shared: Adventure · Exploration · Action RPG

Phasmophobia
Shared: Horror · VR · First-Person

Outlast
Shared: First-Person · Horror · Atmospheric

The Forest
Shared: Horror · Adventure · First-Person

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

The Witcher 3: Wild Hunt — Remastered
Shared: Adventure · Atmospheric · RPG

Last Epoch
Shared: Action RPG · Hack and Slash · Adventure

Wolcen: Lords of Mayhem
Shared: Action RPG · Adventure · Hack and Slash

Darkwood
Shared: Adventure · Horror · Atmospheric

Torchlight II
Shared: Action RPG · Hack and Slash · Dungeon Crawler

Outer Wilds
Shared: Adventure · Exploration · Atmospheric

SOMA
Shared: Horror · Atmospheric · Exploration