In the Borderlands and Beyond sourcebook, five new races, three brand-new classes, and twenty-five subclasses expand the options for character creation in Iron Kingdoms: Requiem, and a slew of new backgrounds and adventuring companies stand ready to brave the mysterious, ancient, and untamed lands that lie beyond human civilization's borders. Borderlands and Beyond also includes over a hundred new spells, unique weapons and items, Iosan and Rhulic mechanika and warjack options, and rules for commanding powerful and lethal warbeasts.

Borderlands and Beyond expands on the world of Iron Kingdoms: Requiem with a host of new options for players:
- All new races, including the boar-like farrow, pygmy trolls, and soulless elves
- Introduces the borderlands to Iron Kingdoms: Requiem, the ancient empires of dwarves and elves that explores life beyond the Iron Kingdoms for players.
- Allows players to command powerful warbeasts, bonded monsters with their own unique magic and abilities