Skill level

Skill level determines the overall difficulty of a game - how many monsters and powerups are out there, how many ammo various items give. There are 5 of them: They are also divided into Easy, Medium and Hard. This classification determines the number of things. This means that ITYTD and HNTR will have the same number of monsters and items, but they will vary in other terms.
 * I'm Too Young To Die - easy
 * Hey, Not Too Rough - easy
 * Hurt Me Plenty - medium
 * Ultra-Violence - hard
 * Nightmare! - hard