D&D Player's Handbook
Publisher: Wizards of the Coast
System: D&D fifth edition
Type: Accessory
https://store.steampowered.com/app/360090
D&D Classics: Complete Thief's Handbook
Publisher: Wizards of the Coast
System: D&D Classics - AD&D 1E/2E
Type: Accessory
https://store.steampowered.com/app/1076820
Mythic Monsters #12: Fairy Tale Creatures
Publisher: Legendary Games
System: Pathfinder RPG and D&D 3.5/ OGL
Type: Accessory
https://store.steampowered.com/app/742810
Tropicana: Researchers of the Lost City
Publisher: GRAmel
System: Savage Worlds
Type: Adventure
https://store.steampowered.com/app/741180