Hello ! First I would like to apologize if a topic like that has already been created (though I didn't find one like it)

But after watching this review I wanted to check on the Re-volt game but I noticed it disappeared.

I tried the link in the review description but I got a 404.

Also I noticed that Re-volt wasn't the only racing game that disappeared. I can't name them all but it's clear that some racing games have been removed from the library.

Did something happen ?

Well I can't say anything about the other games you can't name, but Re-Volt was temporarily removed due to licensing issues/questions.

There is a list of games removed from the library over the years, but basically it boils down to licensing issues and the like, in the case of some of the racing games it might be car companies and/or in game music that is at fault. In the case of Re-Volt GOG had uploaded some fan based patch, mod or engine replacement or something that they may not have had the right to. The list is here: http://www.gogwiki.com/wiki/List_of_games_removed_from_GOG

I see, that's a shame.

Anyways thanks for the answer, hope it'll (and the other games) will be back

From the post in the re-volt forum, it looked like they were provided with something which they weren't told was the work of a third party.