"Finally?" I thought the whole history of D&D was defined by lawsuit happy owners asserting their right to be paid for every mention of a thought they'd shared, from pre-history to perpetuity.
And it was awesome. Reminds me of the old days of MUDs where you could murderhobo your way from Sesame Street on to Xanth and then from Camelot to the literal Zodiac. I miss that spirit of building a common cultural mythology that corporate “monetization” has strangled.
Some links:
Troika! itself: https://www.troikarpg.com/
A review/example of Troikafeld that you can probably use to reconstruct the original Troikafeld game: https://www.prismaticwasteland.com/blog/troikafeld-a-review-...
If you're willing to play online, I believe there are a few discord groups where you can find people specifically interested in particular games.