Source: Official website
Siren: Quiz
Note: This quiz, the "Siren Maniac Quiz", was posted on the official Japanese website to commemorate the "best" reprint of the game. If you score 100 points (10/10) you will be presented with a link to a downloads page featuring wallpapers and an MP3 to download.
You can access it by clicking this button on the main page: 
[Q1]
How many times each day does the siren sound?
① One
② Two
③ Four
[Q2]
What is the name of Miyako Kajiro's pet dog?
① Caleb
② Cherub
③ Serb
[Q3]
Which of the following types of fortune can be obtained at Mizuhiruko Shrine?
① Very lucky, lucky, bad luck, very bad luck
② Medium luck, future good luck, bad luck, very bad luck
③ Minor luck, lucky, unlucky, very bad luck
[Q4]
What is Kyoya Suda's username?
① SDK
② TPD
③ SKD
[Q5]
What food served as a model for Hanuda Noodles?
① Morioka reimen
② Hiyashi chuka
③ Jajamen
[Q6]
Which of these instruments does Naoko Mihama play?
① Japanese drum
② Quena
③ Oboe
[Q7]
What is the name of Harumi Yomoda's aunt who takes care of her?
① Momoko
② Harue
③ Akemi
[Q8]
What are the real names of Kei Makino and Shiro Miyata?
① Tatsuya and Katsuya
② Shoichi and Shoji
③ Takaaki and Katsuaki
[Q9]
What is the name of the district containing the rice fields?
① Karuwari
② Tabori
③ Arato
[Q10]
What is the name of the drowning victim as seen in the 7 September 2001 edition of the magazine Shintokumaru?
① Namiko Yoshikawa
② Shoichi Matori
③ Megumi Suzuki