I do like ‘the Paradox approach’ to expansions, where the paid additions are accompanied by big free updates with new things for all players. So sure, city-building sim Cities: Skylines [official site] will be playing with snow and trams in the Snowfall expansion next Thursday, but developers Colossal Order are also working on new things for everyone. I do like the look of the ‘Theme Editor’ letting folks retheme the world to look like, say, another planet. Or covering it in Dolph Lundgren. Have a look:
Cities: Skylines Adding World-Changing Theme Editor
