Games like Nineteen
Games like Nineteen include Psychonauts, ALTF4, Rise of the Tomb Raider™, Ratchet & Clank: Rift Apart, and Pumpkin Jack. We matched them by the tags players give Nineteen on Steam (Action, Singleplayer, Runner, Adventure, and Survival): closest matches first, and among equally close ones the better-known games.

Psychonauts
Shared: Singleplayer · Action · Adventure

ALTF4
Shared: Runner · Survival · Action

Rise of the Tomb Raider™
Shared: Action · Adventure · Singleplayer

Ratchet & Clank: Rift Apart
Shared: Singleplayer · Adventure · Action

Pumpkin Jack
Shared: Action · Adventure · Singleplayer

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Action · Adventure · Singleplayer

Sonic Frontiers
Shared: Action · Adventure · Singleplayer

Tomb Raider Game of the Year
Shared: Action · Adventure · Singleplayer

Sonic Adventure 2
Shared: Action · Adventure · Singleplayer

Grand Theft Auto V Legacy
Shared: Action · Third Person · Singleplayer

Crash Bandicoot™ 4: It’s About Time
Shared: Action · Adventure · Singleplayer

Bully: Scholarship Edition
Shared: Action · Adventure · Singleplayer

Sonic Adventure DX
Shared: Adventure · Singleplayer · Action

Portal 2
Shared: Singleplayer · Platformer · Action

A Hat in Time
Shared: Adventure · 3D Platformer · Cute

God of War
Shared: Action · Singleplayer · Adventure

Spyro™ Reignited Trilogy
Shared: Adventure · Action · Singleplayer

Psychonauts 2
Shared: Singleplayer · Adventure · 3D Platformer

Marvel’s Spider-Man Remastered
Shared: Action · Singleplayer · Adventure

SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated
Shared: Adventure · Action · 3D Platformer

PRAGMATA
Shared: Action · Adventure · Singleplayer

Ori and the Will of the Wisps
Shared: Singleplayer · Action · Adventure

SONIC X SHADOW GENERATIONS
Shared: Action · Singleplayer · 3D Platformer

Get To Work
Shared: Singleplayer · Adventure · Action