The Fantasy Trip by Steve Jackson Games has a long tradition of offering solo adventures like Death Test. When Douglas Cole of Gaming Ballistic secured a 3PP license for TFT he and his authors continued that tradition with their own series of adventures.
Now he and his team of authors did the work into making these adventures compatible with Old School Essentials. Given that OSE is a hop and skip from a dozen other classic editions and close clones these adventures can be used by a wide variety of OSR systems.
He has started a Kickstarter to fund the printing and final work on these adventures.
I was given Til Death do Us Part to try and I found it fun and interesting to play out. Its replayability is good as there are multiple paths with multiple outcomes to explore. I think leveraging the TFT community's experience with solo adventures is a great idea and will create a fun niche for classic edition hobbyists to play with between sessions and campaigns.