Rulebooks
The official rules, concepts, and applications for every game in the OFMOS® family
1. Available Rulebooks
OFMOS® Essential
Rulebook (2026): The complete guide to OFMOS® Essential. Covers setup, gameplay stages, all six CEO actions, synergy formations, scoring, business concepts and applications, and player modifications. Everything needed to play — whether abstractly, as a business simulation, or with Mods.
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OFMOS® Essential (99 Prototypes Edition)
Rulebook — Prototype (2024): Two-page reference included in every copy of the game. Covers all actions, point calculations, and the recommended player modifications at a glance.
Brochure — Prototype (2025): Single-page reference included in every copy of the game.
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OFMOS® Classic — Prototype
Rulebook — Prototype (2024): Instructions booklet covering setup, the two-stage gameplay, all actions, alignments, and cash flow.
Business Concepts Sheet — Prototype (2024): Two-page reference mapping the game's actions and events to the real-world business dynamics they simulate.
Quick Start Sheet — Prototype (2023): One-page reference distilling all rules and actions for quick onboarding.
All three documents are available for reference as OFMOS® Classic remains in development.
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OFMOS® Professional — Prototype
Rulebook — Prototype (2019): Instructions booklet covering the four-stage gameplay (Startup, Expansion, Restructuring, Finale), dice mechanics, product conversions, and all actions.
Available for reference as OFMOS® Professional remains in development.
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OFMOS® Academic — Prototype
Rulebook — Prototype (2018): Instructions booklet covering the four-stage gameplay (Startup, Expansion, Restructuring, Finale), dice mechanics, product conversions, and all actions.
Available for reference as OFMOS® Academic remains in development.
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Mushroom Gangs™ — Prototype
Rulebook — Prototype (2022): Instructions booklet covering setup, all seven picker actions, Team Up formations, and scoring.
Available for reference as Mushroom Gangs™ remains in development.
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2. How to Use the OFMOS® Essential Rulebook
For First-Time Players: The OFMOS® Essential Rulebook is self-contained. Read the Setup and Play sections, and you are ready for your first game. The strategic depth reveals itself through play — not through pre-reading. Start with the base rules and add Mods after a few sessions.
For Facilitators: The Rulebook includes a Business Concepts section that maps every game action to its real-world strategic equivalent. Use this section to prepare structured debriefs. For structured session designs across each of the five strategy learning solutions, see the Learning Guides page.