If you previously signed up to beta test Project Spark on Windows 8, I suggest you check your email as a fresh batch of beta keys have been sent out to over 10,000 people. It should be noted, however, that only those who signed up for the beta prior to June 24th are eligible for this round of keys.
Project Spark was revealed during Microsoft's 2013 E3 press briefing in June 2013. The free digital downloadable title will give players the options and tools to create virtually anything they can imagine. "Project Spark is a powerful, yet simple way to build and play your own worlds, stories, and games," the game's description reads. "Share all of your creations to a dynamic community, and play what the community makes."
Although the today's batch of codes is good for the Windows 8 version, an Xbox One and Xbox 360 version of the game is also in the works. An Xbox One beta is also expected to be available this month.