# PlatformGame > A serious game and business simulation that teaches multisided platform strategy, network effects, and the chicken-and-egg problem through a 36-month marketplace cycle. PlatformGame is a free, interactive marketplace simulator built for business schools, professors, and founders who want to learn platform strategy by doing. The public demo is free to play — no credit card required. Players step into the shoes of a marketplace founder and navigate cold-start, liquidity, trust, and growth tradeoffs over a 36-month simulation. Available languages: English (default), French (`/fr/*`). See [llms-fr.txt](/llms-fr.txt) for the French summary. ## Pages - [Home](/): Overview of the simulator, network-effect concepts, and target audiences. - [How It Works](/how-it-works): Game flow, player dilemmas, core mechanics, and learning outcomes. - [Sign In](/auth): Sign in or create an account to access a session. ## Pages (Français) - [Accueil](/fr): Présentation du simulateur, des effets de réseau et des publics cibles. - [Comment ça marche](/fr/how-it-works): Déroulé du jeu, dilemmes, mécaniques et objectifs pédagogiques. - [Connexion](/fr/auth): Connectez-vous ou créez un compte pour accéder à une session.