Blockland - Blockland is a non-competitive multiplayer sandbox-style construction game. It's kind of like playing with legos on the internet.
Garry’s Mod - Garry’s Mod is Funny, Sandbox, Co-op, Building, FPS, Action, Single and Multiplayer video game created by Facepunch and published by Valve.
Roblox - Reimagining the way people come together.
Block Earth - Block Earth is an addictive, Action, Building, Crafting, Exploration, Sandbox, Construction, Single and Multiplayer video game developed by Choofun Games AB.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Cubelands - Cubelands is an Exciting, Role-playing, Sandbox, Building, Single and Multiplayer video game created and published by Upjers.