In addition to playing the campaign, the game will also offer a sandbox mode, where you can grow and grow and grow and not deal with any missions. Graphically, it has its own style, which may not be as rich and detailed as in some other management games, but it doesn’t look bad, and hopefully it will run well even with really crowded maps. It also has its own style in content and presentation. But so far it looks nice and…complex.
Source: N4G PC Rise of Industry 2 – Gamescom Impressions