Games like Knee Deep
Games like Knee Deep include Oxenfree, Life is Strange: Before the Storm, Firewatch, What Remains of Edith Finch, and L.A. Noire. We matched them by the tags players give Knee Deep on Steam (Adventure, Mystery, Indie, Choices Matter, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Oxenfree
Shared: Choices Matter · Indie · Mystery

Life is Strange: Before the Storm
Shared: Choices Matter · Female Protagonist · Adventure

Firewatch
Shared: Adventure · Mystery · Indie

What Remains of Edith Finch
Shared: Mystery · Adventure · Story Rich

L.A. Noire
Shared: Adventure · Mystery · Noir

Contrast
Shared: Adventure · Indie · Female Protagonist

Sherlock Holmes: The Devil's Daughter
Shared: Adventure · Mystery · Crime

Little Misfortune
Shared: Indie · Adventure · Choices Matter

The Witcher 3: Wild Hunt — Remastered
Shared: Adventure · Choices Matter · Story Rich

Tomb Raider Game of the Year
Shared: Adventure · Female Protagonist · Third Person

Hellblade: Senua's Sacrifice
Shared: Female Protagonist · Adventure · Story Rich

A Plague Tale: Innocence
Shared: Adventure · Female Protagonist · Story Rich

Rise of the Tomb Raider™
Shared: Adventure · Female Protagonist · Third Person

GRIS
Shared: Indie · Adventure · Female Protagonist

This Bed We Made
Shared: Mystery · Female Protagonist · Third Person

Outer Wilds
Shared: Mystery · Adventure · Indie

Murdered: Soul Suspect
Shared: Adventure · Mystery · Singleplayer

Night in the Woods
Shared: Adventure · Choices Matter · Dark Humor

Sally Face - Episode One
Shared: Indie · Adventure · Mystery

Life is Strange Remastered
Shared: Choices Matter · Female Protagonist · Mystery

Life is Strange: True Colors
Shared: Choices Matter · Female Protagonist · Adventure

Sherlock Holmes: Crimes and Punishments
Shared: Adventure · Mystery · Crime

Detroit: Become Human
Shared: Choices Matter · Adventure · Story Rich

Life is Strange: Double Exposure
Shared: Choices Matter · Female Protagonist · Mystery