TTI/NEC's Turbo Grafx-16/Turbo Duo/PC Engine

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Yo' Bro!

Secret doors and Sewers:

You can use grenades and rockets to open secret doors and sewers. Level 1: Move toward the upper right from starting place of Lil' Bro, turn right, down the first street that you cross, then use a grenade to bomb next to the door of the first building you see.

Ys Book I and II: Ancient Ys Vanished

Passwords:

Fight Dark Fact with 163 life, all weapons, and all armour: don't forget to equip Adol with the Silver Armor, Sword, and Shield before you fight Dark Fact. This code will allow you to defeat Dark Fact in two or three hits.

          1J4sQ/VMzo#22/2zKKKKB
          Bjx$$/fgpphff/M3M3M3M
          mcN2N/2N2N2N2/N2N2010

Start Ys with 99,999 EPs and 65,535 gold:

          *Q2eb/bbbCFjj/jjhghgh
          ghghg/hghghgh/ghghghg
          yQyQy/QyQyQyQ/yQyQzPz
          PzA

Darm Tower 25F: once the game begins, press II to read volume Fact.

          1d2g5/TzFY9??/?*rrrrj
          jjx$w/PP1TWtt/$jfjfjf
          zPaoa/oaoaoao/aoaoZpZ
          pZS

Password to Ys Core:

          p9WaA/TF?mlHH/HHHHHHG
          XGGHH/yLLLWvj/j4ejzz2
          1NO4s/Wtt*acM/N2N2N2N
          ??2

Ys Core: once the game begins, walk through the door and talk to the people. It kind of sucks because it takes five minutes to talk to all of the people.

          p8C?Y/FYYQJuu/uuuuJJK
          aKKZZ/xWWWL1$/$skfPPP
          QzzKX/rYYDl6p/hghgjfj
          fkf

Start game with 65,535 experience and gold.

          ASzz2/DDDDC#C/#C#C#DH
          Qgggg/ggf$$$$/$$$$?$$
          $$$$$/$$$$$$$/$$$$$$$
          $$$$O/##

Ys IV: The Dawn of Ys (Japanese release)

Development Room:

After you have finished the game, restart the program and select Continue, then press II and the third option in the menu will be the "Development Room".

Password:

Start at Demanicus

          dQllv/egrKJ6J/6J6Mdh$
          B9Foa/Xhjfjgn/nnoaC#C
          99999/9999999/9999999
          99999/bb