Maxis have a beta sign-up page live now, you can go sign up here for a chance to test the new Sim City currently being developed. You’ll need an origin account and your dxdiag file in .txt format, then just answer a few questions and you’re done.

Note: You will encounter an issue when trying to upload your dxdiag.txt, this is because the upload will only accept one file on the system named dxdiag.txt so just edit your file to include a unique name or series of characters and it will work fine.