Project Crucible Is based very loosely on the Cancelled Russian F2P Game Halo Online It was eventually modified and rebuilt from the ground up to be free of any reliance on original Cache Files or Code. Under Loose Microsoft Approval this Game is Quietly Being Developed and is intended to be an Open Source Halo Sandbox for anyone who Legally owns Halo The Master Chief Collection. Project Crucible Microsoft Corporation. Project Crucible was created by Gungnir Studios under Microsoft's "Game Content Usage Rules" using assets from Halo, and Project Crucible is not endorsed by or affiliated with Microsoft.