In support of the New Game+ dungeon and Sindar Ruin connection, Suikosource user and dataminer JiN88 explored the Japanese demo to support the idea that Sindar Ruin underwent some major changes during development:

• In the entrance between White Deer Inn and Sindar Ruin, there are 2 statues that are generic. In the demo, those statues are gendered with pronounced breasts, and appear snake-like, resembling the Greek mythical monster Lamia. The generic statues exist in the demo, so there is no reason the developers would go out their way to make a different pair.

• At the last puzzle where you put the plate in, the plaque that you would normally read is there instead of in the room next ahead.

• The two statues of the Double Head are absent.

• In the boss room of Sindar Ruin, there is a weird sprite that isn't seen anywhere else (it's a bit grainy so to see it you will need to zoom in). The position looks like it's supposed to be for an arch, but notably it has three heads. Double Head is the boss you would normally meet here only with two heads, suggesting there was originally a boss here with three heads.

According to Raww Le Klueze, global admin of the Suikosource forums, there are three unused sprites found in the PC version that appear to be part of an unused Blue Gate summon or something similar. The three sprites are supposed to appear in different spots on the screen which would explain why they are looking in different directions.

To support that idea, in the Gensou Suikoden II 108 Stars Character Guide (published only in Japan by Konami), within a section detailing a scrapped idea to summon spirits of other elements, there are a few characters resembling the three unused sprites if they were mixed together.

According to Suikosource user JiN88, the Japanese demo of Suikoden II contains two debug/testing rooms.

The first test room claims to be in Radat Town, despite seeming to be in Kyaro Town. The room contains various warping and unfinished textures, out-of-place objects like barrels, and two non-functioning Warp points. Of the warp points, one can be found down near a river and loads nothing, while the other can be found near a bridge with an Anita NPC and some invisible objects. While this test room seems to be empty, except for one small area featuring several invisible objects, a pushable tree that you can talk to, and a row of NPCs that can be pushed, but cannot be interacted with without crashing the game. There are also two Gabocha NPCs, one of which can warp you back to somewhere else in the test room, while the other has some dialogue and acts like a shopkeeper. Finishing the conversation with the shopkeeper Gabocha will cause the game to crash. Interacting with any Anita NPC will cause the game to crash.

The second test room contains several repeating groups of Anita, Gengen, and Old Man NPCs in a sort of army formation. The name of this second debug room is "神様の村" which means "Village of God"/"God's village". Talking to the Anita and Gengen NPC groups will have them say a single line of dialogue (the Anitas however will have no text), and once finished will cause the game to try and load something, which results in the game crashing. It's thought that they would try to warp you somewhere with a cutscene. Raww Le Klueze, global admin of the Suikosource forums, has translated this room's dialogue as such:


This latter piece of dialogue might be a reference to the song "Nice Hot Water", a 1966 song in the "Nihon no Uta" Japanese local song series that was famously covered by the Japanese comedy rock band The Drifters. The first line before the hyphen is the same as the song, and the second line after the hyphen is almost the same as the song.

There were 2 official demo versions released for the game. Suikoden 2 (JP) demo was given alongside Metal Gear Solid (JP) on September 3, 1998; Suikoden 2 (PAL) demo was given alongside Vandal Hearts 2 (PAL) on June 30, 2000.

In the game there are 2 modes: New Game and Battle Mode.

New Game essentially has the the gameplay it would at retail until the battle against the Mist Shade, and an additional skit as an ending. When translated to English, this reads:


In Battle mode, the player traverses North Swallow Pass, now called Trial Road, with a couple of different party members, battling against enemies and a different boss. This mode is also present in the normal game, but is inaccessible without hacking. Both modes also have their respective ending.

There is not much different from the retail version, but the PAL demo does contain the full base game (although it is translated into Spanish for some reason).

In the Demo ending, other than the dialogue used in the skit, there is unused dialogue present suggesting some parts of the ending were scrapped:


It's worth noting that Mukumuku is silent in the demo while Mekumeku just doesn't load, but is present in memory. Whether it was scrapped or is still unlockable is unknown.

Also in the room, there are 4 maids surrounding Riou just out of bounds at the bottom of the screen. After some testing, it was found to be a developer trick, wherein the player is always in control of Riou, and when interreacting with any of the maids, the demo will end early.