Games like OneHanded
Games like OneHanded include Neon White, Warframe, The First Descendant, Halo Infinite, and Borderlands 2. We matched them by the tags players give OneHanded on Steam (Action, Platformer, Shooter, 3D Platformer, and Looter Shooter): closest matches first, and among equally close ones the better-known games.

Neon White
Shared: 3D Platformer · Platformer · Action

Warframe
Shared: Action · Looter Shooter · Free to Play

The First Descendant
Shared: Looter Shooter · Action · Free to Play

Halo Infinite
Shared: Action · Shooter · Free to Play

Borderlands 2
Shared: Action · Shooter · Looter Shooter

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

Aimlabs
Shared: Shooter · Action · Free to Play

Delta Force
Shared: Free to Play · Shooter · Action

Squirrel with a Gun
Shared: Action · Shooter · Platformer

Destiny 2
Shared: Looter Shooter · Free to Play · Shooter

My Friend Pedro
Shared: Action · Shooter · Indie

War Thunder
Shared: Action · Free to Play · Combat

Sonic Frontiers
Shared: Action · 3D Platformer · Platformer

Pseudoregalia
Shared: 3D Platformer · Platformer · 3D

Sonic Adventure 2
Shared: Action · Platformer · 3D Platformer

Soda Crisis
Shared: Action · Shooter · Platformer

Apex Legends™
Shared: Shooter · Action · Free to Play

Enlisted
Shared: Action · Shooter · Free to Play

World of Warships
Shared: Shooter · Free to Play · 3D

Sonic Adventure DX
Shared: Platformer · 3D Platformer · Action