Game Specific Challenges

Game Specific challenges are any type of challenge that doesn't come under any other category, due to specific game mechanics, or glitches and cheats

Examples
Super Mario 64 has a challenge which involves getting a 1Up mushroom to chase you while you collect 8 red coins. A popular one from Pokèmon is the Nuzlocke Challenge, where any Pokemon which is knocked out is declared "dead" and you can only catch the first pokemon you see on any path. Portal has challenges, where you have to use the minimum amount of portals possible to finish a level