[2020] i have r6 in my uplay account. what happen when i buy this game again in steam?

Originally posted by Chiu_Jill: i bought this game 5 years ago on Uplay. And i link my Steam account to my Uplay account now. if i buy the Ultmate Edition on steam. Will it upgrade my Uplay? or it become two account?

So definitely recommend against doing this as we cannot guarantee all of your content will transfer over correctly. An alternative way to do this is to buy in-game credits to get the content you want, which guarantees you get all of the content that you want without any risk of lossing anything via transference.