Step 1 - Register
Register to Intel DevMesh, and create a profile, so you can log in and submit your project for early access review.
Step 2. Join XeSS Early Access Group
Join the XeSS Early Access Review Group, so you can submit your game to the group for early access review.
Step 3 - Publish Your Game Project
Author then and publish your game project to Intel DevMesh and into the XeSS Early Access Review Group, to have your game reviewed for early access.