# Touko Tahkokallio — Curiosity, Physics, and the Power of Mental Playtesting (#94)

An episode of [Think Like A Game Designer](https://invisiblenetwork.ai/podcast/1450200089), 6 Nov 2025, 1 h 14 min.

Audio: https://api.substack.com/feed/podcast/178160871/dde85e37d129635757fa74b3838a16e0.mp3

Touko Tahkokallio is one of the rare designers who has mastered both tabletop and digital worlds. Starting out as a theoretical physicist, Touko shifted careers to follow his passion for play. First by designing acclaimed board games like Eclipse, then shaping some of the biggest mobile hits of all time at Supercell, including Hay Day, Boom Beach, and Brawl Stars. In 2022, he co-founded a mobile game studio Stellar Core which he is the chief creative officer. In this episode, we explore the hidden value of juggling multiple projects, how to prototype without rules or components, and why a playful mindset is essential, especially when the work gets tough. This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit justingarydesign.substack.com/subscribe

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