GIGATONNE 2026–2100
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STABILISED AND TURNING
Peak +1.81°C · in 2100 +1.76°C
1 of 7 Earth-system thresholds crossed
37 instruments · mean public support 50%
gigatonnegame.com
gigatonnegame.com
Gigatonne — a climate strategy game
Run the planet from 2026 to 2100. Thirty-eight policy instruments, a carbon budget of four hundred gigatonnes, a populist backlash that wins elections, and a tech lobby selling a silver bullet. Stop t...