Unlock Difficulties Offline:
Successfully complete either Episode 1 or 2 on Normal, Hard and Very Hard to unlock other difficulty modes while offline.
Avoid Mine Field Damage:
On a level with a trap mine field hold Start and run through it and you will
not get hurt.
Avoid Walking near Traps and Enemies:
Press Start to display the Main menu and you will be able to run when you
normally wouldn't be able to because you are near an enemy or trap.