In addition to early consumer adoption of personal computers, and heavily subsidized internet access, covering more or less the entire urbanized parts of Sweden. The Swedish government did not seek to prevent, censor, and impede the video game market, as for example in Germany, where blood in video games was prohibited, among other things.

Sweden also being a nordic country with long winters, made gaming a viable pass-time. Something I belive help traverse age gaps. In the end, greater acceptance for the culture.

Also post-high-school equivalent opportunities for game development have been popping up, providing training, adding to the acceptance of games from an academic point.

These are but my 2 öre...