But Roblox is primarily a building game, not a market simulation. The game is physics-based and encourages both building things out of virtual blocks, and using scripting to code how items behave.

Roblox said that it has reached a milestone in user-generated games. It now has more than 1.7 million game creators on its Lego-like game platform.

Epic Games launched two new Lego-inspired games inside Fortnite on Tuesday. They’re called Lego Obby Fun and Lego Raft Survival.

The Lego Group is bringing three weeks of challenges, quests and exclusive rewards to Sega’s Sonic Speed Simulator in August.

Since its launch in 2006, the free-to-play, user-generated massively multiplayer online game Roblox has given millions of players the power to create hundreds of original games. Using building ...