There are four types of quests in the game:
- Quests are connected to the basic investigation. The icons for these quests are marked with a gold frame.
- Quests connected to the additional investigation. The icons for these quests are marked with a silver frame.
- Event quests. The icons for these quests are marked with a frame that's connected to the scene and theme of the special investigation.
- Personal quests for the player. Some quests require the player, not the characters, to do an action: for example, registering an account or exchanging gifts through the G5 Friends service. These quests don't affect the story of the game, but you can get rewards for them. The icons for these quests are marked with a blue frame.