Rematch battle against Astaroth and his undead form, Nebiroth. He is guarding the entrance to Sardius chambers.
If you want to proceed to the final battle, you need to slay Nebiroth with the Goddess Bracelet.
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https://www.youtube.com/watch?v=ZMsuVoLcpOE
The blonde medic makes a trip down memory lane.
Taken from nicovideo: http://www.nicovideo.jp/watch/sm5422217
Original uploader: http://www.nicovideo.jp/user/1862615
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https://www.youtube.com/watch?v=wZVexUcBXd0
How the first battle BGM could sound if Etrian Odyssey II was a NES game.
Taken from Nicovideo
Original Title: 世界樹の迷宮II バトル前編 ファミコン風アレンジ
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https://www.youtube.com/watch?v=V8DKnvPfQSk
También conocido como "El día que Marcel sucumbió a la bestia".
Discord de La Ratonera: https://discord.gg/tgnDEbFWnZ
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https://www.youtube.com/watch?v=DqYCEAD0Lh0
Gameplay for the pc version. Adlib sound is enabled (sfx and MIDI bgm).
If you want to skip the trap setting phase, go to 7:40.
I think the pc version is quite better than the gaming consoles' Home Alone games. Not only they're completely different, the gameplay is plain WEIRD.
If you want to know how to change the sound engine, you need to have the HACONFIG.EXE file in the game's folder. If you don't have that file, well... too bad: you're stuck with pc speaker.
As a side note, this was recorded using DOSbox for the Wii.
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https://www.youtube.com/watch?v=RfjCSbvOI-M