How do you stand out at Comic Con Brazil, surrounded by global giants in geek entertainment? You turn Brazil’s most-used app into a game. BIS, one of the most beloved chocolate brands in the country, launched a fully playable RPG on WhatsApp, Meta’s messaging app installed on over 90% of Brazilian smartphones. Inspired by vintage gamebooks and geek culture, the experience invited users to play through chat, making every message a decision, every emoji a clue, and every interaction a step in a branching fantasy story. No downloads. No consoles. Just a phone and the curiosity to explore. Over 90,000 people joined in just three days—before Comic Con even started—making it the most-played RPG in Brazil and a cultural moment powered by chocolate and imagination.