Minecraft wiki entry for Mechanics, associated text: Difficulty: An option that has a direct impact on the ease of gameplay, allowing the game's challenges to be tailored to the player's skill level.
Renewability: Refers to the possibility of an item or block to be obtained multiple times on Survival or Adventure modes.
Scoreboard: A complex gameplay mechanic utilized through commands. Scoreboards are used to track, set, and list the scores of entities in a myriad of different ways.
Tint: Tints are applied to several blocks, items and particles in order to modify the color their textures use.