Whether you are looking to investigate strange magical occurrences in modern-day London or sail cold, mist-shrouded seas in search of glory, Chaosium’s legendary percentage-based system has you covered. The Humble RPG Bundle: From Rivers to Fjords offers an extensive digital collection centred on the Basic Roleplaying: Universal Game Engine (BRP), bringing together urban fantasy, historical adventure, and core game mechanics.
Supported by Chaosium, Inc., this collection provides everything game masters and players need to run games using the classic d100 ruleset that powers titles like Call of Cthulhu and RuneQuest. All digital titles included in this campaign are fulfilled via DriveThruRPG as DRM-free ebooks. Proceeds from the bundle support the World Wildlife Fund.
Initial Tier – £3.71
Pay £3.71 to unlock 4 items worth £34.20:
- Basic Roleplaying: Universal Game Engine
- Basic Roleplaying: Gamemaster Pack
- Age of Vikings Quickstart
- The Domestic – Rivers of London RPG Solo
Tier 2 – £7.42
Pay £7.42 or more to also unlock 4 additional items (8 total), worth £71.85:
- Rivers of London: The Roleplaying Game
- Rivers of London: Going Underground
- Age of Vikings: Core Rulebook
- Age of Vikings: The Cursed Farm
Tier 3 – £13.37
Pay £13.37 or more to unlock the complete 14-item collection, worth £115.07:
- Basic Roleplaying: Creatures
- Basic Roleplaying: Universal Game Engine – Quickstart
- Age of Vikings: Gamemaster Screen Pack
- Rivers of London: In Liberty’s Shadow – A Guide to Case Files in the USA
- Rivers of London: The Font of All Evil
- Rivers of London: Jimmy’s Last Dance
At the heart of this bundle sits the Basic Roleplaying system, an intuitive d100 percentage-based mechanic where actions succeed if a player rolls equal to or below their skill score. The universal engine book provides a flexible, modular framework designed to support virtually any genre, from hard sci-fi to high fantasy, without forcing players to learn entirely new mechanics. Alongside the core engine, Basic Roleplaying: Creatures offers over 200 stat blocks covering beasts, prehistoric megafauna, and extra-terrestrial threats.
The bundle highlights two distinct settings built on the BRP chassis. Rivers of London: The Roleplaying Game, based on Ben Aaronovitch’s best-selling urban fantasy novel series, casts players as officers in the Metropolitan Police’s secret magical branch, “the Folly.” Investigations mix procedural police work with Newtonian magic across detailed London locations. On the historical side, Age of Vikings takes players to medieval Iceland, focusing on community, honour, family sagas, and survival in a harsh, unyielding landscape.
Every title in this offer is supplied as a DRM-free PDF, with keys redeemable directly through DriveThruRPG. Note that redemption keys for this specific bundle must be claimed on the DriveThruRPG website before 18 August 2027.
The offer ends at 18:00 BST on Tuesday, 18 August 2026.
Quick Links
- Humble Bundle: Basic Roleplaying deal
