Powerups are items that give your character some kind of temporary bonus. You might need to drive over them, run over them, trigger a special item in a puzzle, or hit a special sequence on your game controller or keypad. The TFD template in Figure D.1 covers acquiring the powerup, using its abilities , canceling the powerup, checking for powerup expiration, and stacking powerups. This same template could also be used for RPG and adventure games where a player can trigger temporary effects from a weapon, get a temporary boost from an item, or receive temporary "buff" spells from other characters .