Playing on harsher map seeds or with 'Hard' starting conditions presents its own set of 'side challenges'. These can include maps with limited fertile land, scarce natural resources, or extreme weather patterns. Adapting your strategies to these environmental constraints adds significant replayability and difficulty.
For example, on a mountainous map, you might rely more heavily on hunting and gathering than farming. On a map with limited stone, you'll need to prioritize trade for building materials. Successfully establishing a thriving town under these adverse conditions is a testament to your planning and adaptability skills.