If the player decides to run away Spoiler:with Nanami during the events that develop around Tinto, the player can reveal an alternate ending in which the hero and Nanami will live quietly in the country.

Additionally, many characters have unique dialogue during this scene, including a script coded in for both Viktor and Flik, even though there's no way for you to put them in your party at this point in the game.

There are many unique dialogue choices for the end of the game after defeating the Beast Rune. Some of these require special conditions to be met, such as having only a single character with you.

Jowy and Nanami can also be hacked into the party using code, which will reveal Jowy having glitched text, but Nanami will have understandable dialogue.

If Jowy is hacked into the party during the game, neither the "King" version, or "Best Friend" version will appear in the HQ anywhere. They can both be removed and added to the party with unique (and different) dialogue, despite these never normally being accessible through traditional means. "Best Friend" Jowy can also be awarded the statue that appears at the top of the castle for obtaining the most kills, even though he is never a part of the party's team after the events that lead to the castle being accessible.

Sheena's default equipment pays homage to his parents from Suikoden 1. His sword is called Kirinji like his father, Lepant, and he begins with an Earth Rune and permanently attached Star Earrings like his mother, Eileen.

Ted, McDohl's best friend from Suikoden 1, has his profile picture hanging in McDohl's room in Gregminster.

McDohl's name has a bizarre glitch when transferring data from Suikoden to Suikoden II. In canon, the hero's name in the first game is Tir McDohl, however the game only transfers the capital letters of the name across, so naming him Tir will result in his name being TcDohl in Suikoden II. In order for his name to be McDohl in the second name, you would have to name him something with only a capital M in the first game. If you name him something in full capitals, it will all be transferred across, for example, naming him TIR will result in his name being TIRohl.

If the player goes through more than 108 battles against Highland Soldiers before jumping off the cliff at the start of the game, the intro sequence will be shown in full color instead of in sepia.

There is an unused rune in the game's code called the "Solitude Rune" which can only be obtained through the use of hacking or a cheat device. The rune will increase a weapon's attack power based on how many people are in your party: the fewer, the greater the increase. It was likely removed due to the extremely substantial boost to the attack stat that the rune can create.

An unused item in the game's code, the Bath Set, is an accessory that can be equipped. Equipping the item prior to entering the bath will cause the wearer to have an item display in front of them.

An unused speech bubble appears in the data for the "Ragged One" enemy which translates to "I'll steal your money!". This never appears in the game, and remains untranslated in NTSC and PAL releases.

The kanji seen on Tuta's outfit (薬) means "Medicine".

It's possible to see an updated entry in Spoiler:Pahn's diary while in Gregminster. This is a reference to the player being able to do the same thing in the original Suikoden.

Oulan's measurements are given as "96-60-89" (38-24-35 inches) in the Japanese release, but when localized, the measurements were changed to "90-60-89", reducing her bust size by six centimeters.

Within the data for the Nightmare enemy is an unused Magic the Gathering card. The sprite itself is never shown in the game.

Special events can occur within the Bathhouse of the castle after collecting and decorating it with antiques. One of the special scenes happens after setting 6 Chinese Plates, where two party members, Wakaba and Long Chan Chan, drop from above for undisclosed reasons; They sometimes appear on the side opposite to their gender.

During an interview, it was revealed that the game's illustrator, Fumi Ishikawa, was a big fan of Flik. The team created a fake set of planning notes for Nina's unite attack with Flik in case Ishikawa was to delete it out of anger for Nina and Flik's relationship.

In the game's files, in a folder called "300_MOVI", there is an FMV file titled ROCK.STR. It is unknown what this video's intended purpose was, but the answer may lie in the Japanese demo version of the game, in the demo's "MOVIE" folder. A video can be found called M_EAT.STR, and based on its name and appearance, it seems most likely it was to be used with Magic Earth Rune - in a similar way to Unite Magic (since they all play their FMV). The last changed date for the file is 1997. The last modified date for the rest of the game's FMVs is 1998, meaning M_EAT.STR was changed quite early in development, being the earliest of them all.

In other later releases like the PSP version, the ROCK.STR file can still be found in the game's data, though they similar go entirely unused.

In a developer interview published in the March 1999 issue of DenGeki PlayStation magazine, it was revealed that Rowd, a character who betrayed the Unicorn Youth Brigade of the Highland Kingdom, was the older brother of the little blind girl in Kyaro Town who disappears near the end of the game, and his motivation for his betrayal was to save more money to cure her blindless. When talking to the girl in Kyaro Town, she states that her big brother plans to use his riches to hire a famous doctor in the Toran Republic (who is suspected to be Liukan, a character from Suikoden who briefly appears in this game) to perform the operation. During the interview, programmer Akiyoshi Ohta also stated that there was originally going to be a battle against Rowd where he would die, but this was cut because "his little sister was too cute to do it."

In Banner Village, the side quest to recruit Tir McDohl is affected if the game imports save data from Suikoden. If the player imports a save file with the 108 Stars of Destiny recruited in the first game, Gremio will appear in the game starting with this side quest. However, in a developer interview published in the March 1999 issue of DenGeki PlayStation magazine, director Yoshitaka Murayama revealed that should you import a save file without recruiting all 108 Stars of Destiny, Ellie will replace Gremio in the Banner Village events of the side quest.

Dataminers on the Suikosource forums discovered an unused dungeon in the game that cannot be accessed other than through hacking. The dungeon is incomplete with some missing features, but is largely playable. While there is no direct confirmation from developers on how it was intended to tie in with the game's narrative, dataminers have concluded the following:

At some point after defeating the Beast Rune, the player is supposed to return to the village of Sajah. There is an inconspicuous-looking rock that does nothing, but which can be removed via hacking to reveal an entrance. While this entrance does not work, it is theorized that once entering this passage, the player would reach the lowest floor of the test dungeon. From there they would travel upward and face six or more bosses (speculated to be Bone Dragon, Stone Golem, Abomination, Double Head, Pest Rat and Harpy - though not necessarily in that order) gatekeeping certain stairs. Monsters would get progressively harder at each stage. There are around six floors and 8 orbs which the player would need to collect to pass through the final door.

In the final room, there is a purple rune that offers 3 choices; When the dialogue is translated into English, it reads:


Looking through all of this dialogue, the first option warps you back to Sajah, leaving you on your way. The second option allows you to step back before deciding again, while the third option warps you to an unknown location.

It is theorized you're supposed to end up in Sindar Ruin as there was a brief moment where Riou was left alone. In the end, you get to replay at that point in time, with previously kept items/stats, and possibly have the combined Rune of Beginning (Sword and Shield Rune) as it has been alluded many times in-game that it was considered as one.

It's speculated the reason why this dungeon was scrapped was because it was too ambitious to be implemented.

To explore on your own (for the North American version) use the following GameShark code to teleport Viki to an Unknown Dungeon (Pick Kazah Village [note: Sajah Village was originally named Kazah Village]):

8006AEAA 0080
D015DC50 E1C4
3015F53D 0009
D015DC50 E1C4
3015F53E 0011