Games like Mega City Void
Games like Mega City Void include Slime Rancher, Terraria, Starbound, Keplerth, and SPORE™. We matched them by the tags players give Mega City Void on Steam (Casual, Adventure, Arcade, Visual Novel, and Sandbox): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · Cute

Terraria
Shared: Sandbox · Adventure · 2D

Starbound
Shared: Adventure · Sandbox · Survival

Keplerth
Shared: Adventure · Sandbox · Exploration

SPORE™
Shared: Sandbox · Casual · Exploration

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

Scribblenauts Unlimited
Shared: Casual · Adventure · Sandbox

Growtopia
Shared: Casual · Adventure · Sandbox

The Long Dark
Shared: Exploration · Adventure · Survival

Stray
Shared: Adventure · Exploration · Atmospheric

A Short Hike
Shared: Adventure · Exploration · Casual

Big Walk
Shared: Adventure · Exploration · Casual

Fallout 4
Shared: Adventure · Exploration · Atmospheric

Minishoot' Adventures
Shared: Adventure · Exploration · Casual

ABZU
Shared: Adventure · Casual · Exploration

Don't Starve
Shared: Adventure · Sandbox · Survival

Carto
Shared: Adventure · Exploration · Cute

DAVE THE DIVER
Shared: Casual · Adventure · Exploration

Flower
Shared: Casual · Adventure · Exploration

Shelter
Shared: Adventure · Exploration · Survival

Florence
Shared: Casual · Adventure · Visual Novel

Slime Rancher 2
Shared: Adventure · Cute · Casual

Rain World
Shared: Exploration · Adventure · Atmospheric

The Forest
Shared: Adventure · Survival · Exploration

