Grand Theft Auto: The Original Trilogy has been removed from Steam and cannot be bought officially anymore. I bought it back in 2021 when it was available.
The Chain Game is a community based relay game for the Grand Theft Auto series. Players work together in each round to achieve an end goal, each taking turns to contribute progress along the way.
For more information, you can visit the following link :)
www.gtaforums.com/topic/979274-the-chain-game-lounge/