Games like Tall Poppy
Games like Tall Poppy include Firewatch, Lethal Company, Amnesia: Rebirth, The Stanley Parable, and PEAK. We matched them by the tags players give Tall Poppy on Steam (Adventure, Action-Adventure, Exploration, First-Person, and Comedy): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · First-Person · Exploration

Lethal Company
Shared: First-Person · Horror · Exploration

Amnesia: Rebirth
Shared: Action-Adventure · First-Person · Adventure

The Stanley Parable
Shared: Comedy · First-Person · Indie

PEAK
Shared: Adventure · Exploration · First-Person

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

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

Outer Wilds
Shared: Exploration · Adventure · Story Rich

Portal 2
Shared: First-Person · Singleplayer · Story Rich

Content Warning
Shared: Exploration · Horror · Comedy

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

MiSide
Shared: First-Person · Story Rich · Horror

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

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

SOMA
Shared: Horror · Exploration · Story Rich

Slime Rancher
Shared: Adventure · Exploration · First-Person

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

Hello Neighbor
Shared: First-Person · Horror · Action-Adventure

Indiana Jones and the Great Circle
Shared: Action-Adventure · First-Person · Adventure

RV There Yet?
Shared: Adventure · First-Person · Exploration

High On Life
Shared: Adventure · Comedy · Action-Adventure

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

Getting Over It with Bennett Foddy
Shared: Horror · Psychological Horror · Singleplayer

Amnesia: A Machine For Pigs
Shared: Horror · First-Person · Exploration