Games like Lawnmower Maniac
Games like Lawnmower Maniac include The Forest, Sonic Frontiers, Ori and the Will of the Wisps, Fallout 4, and Terraria. We matched them by the tags players give Lawnmower Maniac on Steam (Action, Adventure, Platformer, Sandbox, and 1990's): closest matches first, and among equally close ones the better-known games.

The Forest
Shared: Adventure · Action · Horror

Sonic Frontiers
Shared: Adventure · Action · 3D Platformer

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

Fallout 4
Shared: Adventure · Exploration · Action

Terraria
Shared: Sandbox · Adventure · Exploration

Hollow Knight
Shared: Platformer · Adventure · Exploration

Sonic Adventure DX
Shared: Platformer · Adventure · Action

Just Cause™ 3
Shared: Action · Adventure · Sandbox

Just Cause 2
Shared: Action · Sandbox · Adventure

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

Solar Ash
Shared: Action · Adventure · Platformer

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

Grand Theft Auto V Legacy
Shared: Action · Adventure · Open World

Valley
Shared: Adventure · Action · Exploration

Pumpkin Jack
Shared: Action · Adventure · 3D Platformer

ANIMAL WELL
Shared: Exploration · Platformer · Adventure

The Long Dark
Shared: Exploration · Adventure · Atmospheric

Kena: Bridge of Spirits
Shared: Action · Adventure · Exploration

Sonic Adventure 2
Shared: Action · Platformer · Adventure

PEAK
Shared: Adventure · Exploration · Action

No Man's Sky
Shared: Exploration · Adventure · Sandbox

Hob
Shared: Action · Adventure · Platformer

Stray
Shared: Adventure · Atmospheric · Exploration

Rain World
Shared: Exploration · Platformer · Atmospheric