If they like your application they'll send you a form email detailing a multi-phase Unity project they want you to build and submit back to them for review. The first phase is unpaid, while the second two phases are paid a small amount for your time.
There is no initial phone call, no HR screening, or anything normal companies do. Every email response is a copy/paste form email.
After you submit your project for each phase of the review you may be told that they have decided not to move forward with the interview process and "don't have time to give individual feedback."
Not giving even basic feedback as to why you were rejected after wasting several weeks on this process is a complete slap in the face to job applicants.
Stay away from this shady company.