fate accelerated
Fate Accelerated Edition; rules light and easy to apply to any genre. Since it uses aspects for characters and scenes it integrates well. https://evilhat.com/product/fate-accelerated-edition/
https://www.reddit.com/r/Solo_Roleplaying/comments/icuyb4/playing_solo_with_fate/ https://www.reddit.com/r/FATErpg/comments/bnyzhc/can_i_play_the_fate_core_system_solo/ https://forum.rpg.net/index.php?threads/experiences-with-using-fate-or-fae-for-solo-play.800134/ https://www.reddit.com/r/FATErpg/comments/6c07yb/has_anyone_designed_a_method_of_playing_fate_solo/ https://forum.rpg.net/index.php?threads/solo-fate-accelerated-toolkits-untold-the-grimtrail-trio.851392/ https://www.reddit.com/r/rpg/comments/62e8hh/which_system_is_better_for_solitaire_roleplay/
mythic
https://www.youtube.com/watch?v=i-hmOADD1OU https://preview.drivethrurpg.com/en/product/257195/Mythic-Game-Master-Emulator-Deck
game master apprentice
https://preview.drivethrurpg.com/en/product/125685/The-GameMasters-Apprentice-Base-Deck
various reads
https://boardgamegeek.com/thread/1228416/mgme-deck-cards
FU and TGA and Emergent all tried that route via boiling it down to a d6 roll in the first twos cases and a different approach to events.
You could compress Mythic to 10 cards and just number them 10-100. Or 20 cards in incriments of 5.
https://boardgamegeek.com/thread/1202583/so-what-sort-questions-should-you-ask-gm-emulator
https://www.reddit.com/r/rpg/comments/k98pmo/what_game_master_emulators_are_out_there/
https://www.reddit.com/r/rpg/comments/gnjox4/solo_rpgs_to_pass_the_time/