We have 4 cheats and tips on PlayStation 2. If you have any cheats or tips for Forbidden Siren please send them in here. You can also ask your question on our Forbidden Siren Questions & Answers page.
Unlock Puzzle Game:
Get archive 087 on Kyoya Sudo's stage (Day 3, 03:00).
Unlock Stage Select:
Complete the first 19 missions in the game.
Unlock Hidden Movie:
To unlock the 100th item complete the game with the 2nd ending and collect ALL 99 archive items. Then go to the 'Stage Select' screen move the cursor to the upper right corner and start the movie.
Get 087 on Kyoya Sudo's stage.
On Kyoya Sudo's stage acquire archive 087, Day 3, 03:00.
Complete objectives one and two and every scenario for all the stages.