A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Is it probably because I need to download a newer version?
I am using Internet Explorer. I downloaded it and when I want to play a game after I installed it, it tells me I need to do it again.
I have that problem too! I download it, I refresh the page to play the game, and it tells me I need to download the Unity.