In these versions, the game's difficulty is "cranked up" by altering the AI and environmental hazards:
Some versions reduce the effectiveness of the "Seal Vent" mechanic, making it harder to block Springtrap's path. Why Do People Play It? Unfair Fnaf 3
The ventilation, audio, and camera systems fail more frequently, forcing you to use the maintenance panel constantly. In these versions, the game's difficulty is "cranked
Springtrap moves much faster between rooms and is less likely to be fooled by audio lures. In these versions
While "Unfair" could describe a few different fan projects, it most commonly refers to a popular or a hardcore mod that tweaks the game's mechanics to favor the animatronics. Key Features of "Unfair" Versions