Adaptive Difficulty is an extra in the LEGO games, first introduced in LEGO Star Wars II: The Original Trilogy. It would be in every LEGO game from LEGO Star Wars II: The Original Trilogy through LEGO Indiana Jones 2: The Adventure Continues.
Effect[]
When turned on, there are some major changes. If you play well, you'll lose 4,000 studs if you die. If you play poorly and die a lot, you'll only lose 1,000 studs. When its turned off you'll only lose 2,000 studs when you die, regardless for how Well or Poorly you're playing, similar to the first game.
Power Brick Locations[]
The extra is available at the beginning of all games in which it is included.
Price[]
As said previously, the extra is unlocked when you start the games where it is included, without having to purchase it.