Minecraft, Valheim and Raft, just to name a few: Small or even one-man teams from Sweden have produced more video game hits than one would expect from a small country.

"It's the cold weather — you sit inside, you game, you don't really have anything to do outside," Philip Wester, who co-founded the small game developer Landfall, mused when asked to explain the success of Sweden's gaming industry.

Housed in a villa in a sleepy suburb west of Stockholm, the studio — which has around 10 employees — has just had a surprise hit of its own.