Basically, the ability to set difficulty settings for either when hosting a server/in the Scenario Properties while in Game Master mode, or and/or for Profile settings which would take precedence when you host or play scenarios (unless scenarios have hardcoded their own difficulty settings)
Settings like:
1. AI skills like perception and aiming,
2. dDamage to players from AI,
3. either hHaving third person available or not,not
4. pPlayer names and AI names (separate options that you can toggle)
5. Having the AI have Inifinite Reloads (basically when they reload a magazine/rocket/ugl, they get a replacement upon reload)