Someone also mentioned Torrminatorr to me for Linux games but I haven't checked it out myself
Create an account here and there should be a subforum for p2p native linux games. LinuxRuleZ primarily makes the torrents, but if it is not a popular game or if the torrent is old, it is likely dead, so please keep an eye on new torrent posts and try to seed them when they are available. We need more seeders, especially for obscure games and software. LinuxRuleZ does seem to post on rutracker as well, though.
slight tangent
I like seeding both LinuxRuleZ and johncena141. LinuxRuleZ is basically a script with an archive appended at the end, which the script launches a gui to unpack to a location of your choosing. I'm a fan of johncena141 for using dwarfs/bubblewrap to create compressed, sandboxed containers to run games, so you don't have to do any installing.
tangent
Though sometimes I wish there was a way for bittorrent to somehow support sending reproducibly compressed packets through the network that can still have its checksum be verified after it is decompressed. Downloading a lot of these games tends to fill up my drives, and I wish I could squeeze out more space by having uncompressed torrents put inside a large dwarfs container with deduplication and compression applied. Then through the network, it would be sent as zlib compressed pieces so that bandwidth isn't wasted. Not sure if this idea is dumb or impossible in some aspects.
I also use a torrent search engine to find torrents. It doesn't really tell where they are from all the time, so I try to do some digging to see if I can find the source to verify if it is reputable.