It turns out that a game doesn't need to be a big - budget AAA production to become a hit. Perhaps being truly fun is what most players are after. Let's take a look at the three Guinness World Records that "Split Fiction" has achieved: the best - selling local - co - op electronic game within 48 hours of release (1 million copies), the best - selling local - co - op electronic game within one week of release (2 million copies), and the most - played co - op electronic game on Steam (259,003 players).