Take a look at these design decisions in Rimworld:

• Price difference between what you buy and sell goods & services for
  
• Additional price slashing of weapon sales on top of that
  
• Bio-coding of weapons that make enemy weapons useless
  
• Taint applied to dead man's clothing that makes enemy clothing useless
  
• Scaria disease that makes meat of enemy animals useless
  
• Death acidifiers that make enemy items useless
  
• Steel walls burn, so they can be set on fire by invaders

Does this pattern resemble your definition of a challenge?
Or does it look more like game balance gone wild?

If you're fine with it, then this collection isn't for you. But if those decisions seem to resemble a less palatable fevered dream of someone who just breaks stuff, then this collection of mods remove such rules from the game.

These mods are designed specifically to alter the rules of the game in favor of the player.

FAQ
Q: Why is it called Sheriff's Collection?
A: Because I enjoyed watching the movie Cowboys vs Aliens