D&D Dungeon Master's Guide
Publisher: Wizards of the Coast
System: D&D fifth edition
Type: Accessory
https://store.steampowered.com/app/422580
D&D Curse of Strahd
Publisher: Wizards of the Coast
System: D&D fifth edition
Type: Adventure
https://store.steampowered.com/app/450080
Hellfrost: The Dark Seed
Publisher: Triple Ace Games
System: Savage Worlds
Type: Adventure
https://store.steampowered.com/app/552830
Savage Worlds Setting: Necropolis 2350
Publisher: Triple Ace Games
System: Savage Worlds
Type: Setting
https://store.steampowered.com/app/589790