Ikura GDL (archive)

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Note: Because no extension is used on files, this was best way I could describe the format (referring to wiki page title).

Used in the following games:

  • Amorous Professor Cherry
  • Bazooka Cafe
  • Cat Girl Alliance
  • Chain
  • Come See Me Tonight
  • Crescendo
  • Do You Like Horny Bunnies
  • Family Project
  • Figures of Happiness
  • Heart de Roommate
  • Hitomi -My Stepsister-
  • Idols Galore
  • I'm Gonna Nurse You
  • Jewel Knights
  • Let's Meow Meow
  • Pick Me, Honey
  • Private Nurse
  • Sagara Family
  • Secret Wives Club
  • Slave Pageant
  • Snow Sakura
  • Tottemo Pheromone
  • Tsukushite Agechau 4

Common file names:

  • DATA
  • GGD
  • ISF
  • MIDI
  • SE
  • VOICE, 1, 2
  • WMSC

Uncommon file names:
(Trabulance Titles)

  • TRGRP
  • TRMSC
  • TRSE
  • TRSNR

(Kana -Little Sister-)

  • DRSDAT
  • DRSGRP
  • DRSEF

Current Format

Header
Size Content Description
8Bytes Magic/ID SM2MPX10
4Bytes File Count
4Bytes Index Size
12Bytes Archive Name
4Bytes Unknown/Static?
Index Entry
Size Content Description
12Bytes File Name Unused space is filled with 0x00
4Bytes Offset
4Bytes File Size

Older Format

Header
Size Content Description
2Bytes Index Size
Index Entry
Size Content Description
12Bytes File Name
4Bytes Offset
Last Index Entry
size Content Description
12bytes Padding (0x00)
4bytes Total Archive Size

Note3: What is GamelexGS Inc? Is this a company that made or translated some of these early games? I've seen it show up on a few titles executable.