Between October and December 2020, something was different for people playing popular video games like Words with Friends, Angry Birds and Subway Surfers. Instead of a traditional 30-second ad, gamers across the world were invited to participate in a climate change survey. It was an unconventional way of polling that gave University of Oxford researchers an opportunity to tap into the 2.7 billion user-strong gaming market and produce the world’s largest climate change public opinion poll.