Difficulty is a measure of how hard a game is. In the context of Telepath RPG, difficulty determines how much certain things cost, along with how much damage and health enemies have. Additionally, in Telepath RPG: Servants of God, difficulty affects how sophisticated the enemy AI is.
In Telepath RPG 2, difficulty could be changed mid-game using the Options section of the menu. In Telepath RPG: Servants of God, difficulty is selected when creating a new game, and cannot be changed afterwards.
The difficulty levels are Easy, Normal, Hard, and Brutal. Normal is the default difficulty. (Enemy statistics on this wiki are based on the Normal difficulty.)