After my second playthrough, I decided to make the game harder on myself and make rules. I've known other people to do the same, and I'm just wondering what some of you guys did.

Some of my playthrough rules:

• Only handgun (the default), no grenades, upgrades allowed
• TMP no stock, shotgun, no grenades, no upgrades
• Rifle, broken butterfly, grenades, upgrades allowed
  

Broken Butterfly

I did a playthrough with chicago typewriter and unlimited rockets and I found it way too easy.  I still loved it but next time I will make it harder for myself.

Knife only.

only use sniper woah thats a challenge

"Knife only."

Knife and Pistol only mode, no grenades, no upgrades.