Great prices and customer service
I've been using GameBillet since 2018 and they've always provided a good service for Steam games. They often have the best price, particularly for Paradox games, and I've never had any problems with receiving the keys or using them on Steam. (To the best of my knowledge and in my experience these are completely legitimate retail keys sourced from the publishers, not on the grey market or anything shady.) I wanted to leave this review specifically to mention the great customer support team - I had a question yesterday about the pre-order bonus for a Cities: Skylines II and Denis got back to me today, on a Sunday! (For the record, the pre-order bonus is included.) Great service and definitely a storefront that stands out from the competition.