How Challenging is the Challenge difficulty?

[Saw Candyman]

I was just wondering how much harder Challenge is than Rough.

[TLHeart]

The difference between rough and challenge is how big the raids are. At rough the raids are scaled down to 65% of what the raid would be on challenge.

So for every  2 raiders on rough, you will get 3 raiders on challenge. That is the ONLY difference between the two.

[Boboid]

You can find the exact effects of game difficulty by going to your Rimworld folder.

Mods->Core->Defs->DifficultyDefs->Difficulties

Open that XML folder and you'll get a list of all the difficulty modifiers.