Controlling either the fighter, wizard, or ninja, the player can choose from the first six stages and play them in any order, fighting against an assortment of enemy waves, while defending or avoiding collision with their projectiles and other obstacles. There are seven stages in total, which include forests, ruins, and dungeons. The scenery is constantly scrolling and never stops moving until a miniboss or boss is reached, which must be fought to progress further. Each character also possess their own defense methods, such as Leon being able to block projectiles with his shield.
Japanese: アンデッドライン, Hepburn: Andeddorain /wiki/Japanese_language
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"アンデッドライン". MSX Magazine [ja] (in Japanese). No. 69. ASCII Corporation. July 1989. p. 22. https://archive.org/details/MSX_Magazine_1989-07_ASCII_JP/page/n21/mode/1up
"New Soft: アンデッドライン (Undeadline)". MSX Magazine [ja] (in Japanese). No. 70. ASCII Corporation. August 1989. pp. 16–17. https://archive.org/details/MSX_Magazine_1989-08_ASCII_JP/page/n15/mode/2up
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Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
"Gaming World: Soft Flash — アンデッドライン (MSX2)". Technopolis [ja] (in Japanese). Vol. 8, no. 83. Tokuma Shoten. July 1989. p. 44. https://archive.org/details/technopolis-1989-07/01_journal-1989-07/page/n45/mode/1up
Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
"新着ゲーム情報: アンデッドライン [MSX2/+2]". Micom BASIC Magazine [ja] (in Japanese). No. 87. The Dempa Shimbunsha Corporation [ja]. September 1989. p. 262. https://archive.org/details/micomBASIC_1989-09/page/n209/mode/1up
Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
"アンデッドライン". MSX Magazine [ja] (in Japanese). No. 69. ASCII Corporation. July 1989. p. 22. https://archive.org/details/MSX_Magazine_1989-07_ASCII_JP/page/n21/mode/1up
"新着ゲーム情報: アンデッドライン [MSX2/+2]". Micom BASIC Magazine [ja] (in Japanese). No. 87. The Dempa Shimbunsha Corporation [ja]. September 1989. p. 262. https://archive.org/details/micomBASIC_1989-09/page/n209/mode/1up
Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
"New Soft: アンデッドライン (Undeadline)". MSX Magazine [ja] (in Japanese). No. 70. ASCII Corporation. August 1989. pp. 16–17. https://archive.org/details/MSX_Magazine_1989-08_ASCII_JP/page/n15/mode/2up
"New Soft: アンデッドライン (Undeadline)". MSX Magazine [ja] (in Japanese). No. 70. ASCII Corporation. August 1989. pp. 16–17. https://archive.org/details/MSX_Magazine_1989-08_ASCII_JP/page/n15/mode/2up
Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
"New Soft: アンデッドライン (Undeadline)". MSX Magazine [ja] (in Japanese). No. 70. ASCII Corporation. August 1989. pp. 16–17. https://archive.org/details/MSX_Magazine_1989-08_ASCII_JP/page/n15/mode/2up
Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
Martínez, Manuel (September 1991). "Como Acabar: Undeadline". MSX Club (in Spanish). No. 77. Manhattan Transfer. pp. 42–46. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2077/page/n41/mode/2up
Day, Ashley (June 10, 2021). "So You Want To Collect: MSX Games". Retro Gamer. No. 221. Future plc. pp. 52–55. /wiki/Retro_Gamer
T&E Soft (July 22, 1989). Undead Line (MSX2/MSX2+). T&E Soft. Level/area: Staff roll. /wiki/T%26E_Soft
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Szczepaniak, John (November 4, 2015). T&E Soft Chapter - YAMAMOTO, Tetsuya. Vol. 2. S.M.G. Szczepaniak. pp. 40–49. ISBN 978-1518818745. {{cite book}}: |work= ignored (help) 978-1518818745
T&E Soft (July 22, 1989). Undead Line (MSX2/MSX2+). T&E Soft. Level/area: Staff roll. /wiki/T%26E_Soft
T&E Soft (July 22, 1989). Undead Line (MSX2/MSX2+). T&E Soft. Level/area: Staff roll. /wiki/T%26E_Soft
Szczepaniak, John (November 4, 2015). T&E Soft Chapter - YAMAMOTO, Tetsuya. Vol. 2. S.M.G. Szczepaniak. pp. 40–49. ISBN 978-1518818745. {{cite book}}: |work= ignored (help) 978-1518818745
"Software Houst Hot Information: T&E Press". Micom BASIC Magazine [ja] (in Japanese). No. 86. The Dempa Shimbunsha Corporation [ja]. August 1989. p. 335. https://archive.org/details/micomBASIC_1989-08/page/n298/mode/1up
Szczepaniak, John (November 4, 2015). T&E Soft Chapter - YAMAMOTO, Tetsuya. Vol. 2. S.M.G. Szczepaniak. pp. 40–49. ISBN 978-1518818745. {{cite book}}: |work= ignored (help) 978-1518818745
"Gaming World: Soft Flash — アンデッドライン (MSX2)". Technopolis [ja] (in Japanese). Vol. 8, no. 83. Tokuma Shoten. July 1989. p. 44. https://archive.org/details/technopolis-1989-07/01_journal-1989-07/page/n45/mode/1up
"アンデッドライン". MSX Magazine [ja] (in Japanese). No. 69. ASCII Corporation. July 1989. p. 22. https://archive.org/details/MSX_Magazine_1989-07_ASCII_JP/page/n21/mode/1up
"New Soft: アンデッドライン (Undeadline)". MSX Magazine [ja] (in Japanese). No. 70. ASCII Corporation. August 1989. pp. 16–17. https://archive.org/details/MSX_Magazine_1989-08_ASCII_JP/page/n15/mode/2up
"Gaming World: 移植!! — 幻獣鬼 (X 68000 シリーズ)". Technopolis [ja] (in Japanese). Vol. 9, no. 98. Tokuma Shoten. October 1990. pp. 32–33. https://archive.org/details/technopolis-1990-10/01_journal_1990-10/page/32/mode/2up
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Butt, Damian (February 1992). "ProReview - Mega Drive: Undeadline (Import)". Sega Pro. No. 4. Paragon Publishing. p. 58. https://archive.org/details/segapro04/page/n57/mode/1up
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"NEW GAMES CROSS REVIEW: アンデッドライン (メガドライブ)". Famitsu (in Japanese). No. 157. ASCII Corporation. December 20, 1991. p. 40. (Transcription by Famitsu.com). https://archive.org/details/famitsu0157/page/40/mode/1up
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"Gaming World: アクションが苦手でも楽しめる! — アンデッドライン (MSX2)". Technopolis [ja] (in Japanese). Vol. 8, no. 85. Tokuma Shoten. September 1989. p. 46. https://archive.org/details/technopolis-1989-09/01_journal-1989-09/page/n47/mode/1up
"MSX Software Review: アンデッドライン". MSX Magazine [ja] (in Japanese). No. 73. ASCII Corporation. November 1989. pp. 30–31. https://archive.org/details/MSX_Magazine_1989-11_ASCII_JP/page/n29/mode/2up
Baño, Pere (December 1989). "Coleccionable: Undeadline (MSX: 2da generación y Plus)". MSX Club (in Spanish). No. 58. Manhattan Transfer. pp. 28–30. https://archive.org/details/ColeccionableDelJapon/MSX%20Club/MSX%20Club%2058/page/n27/mode/2up
"Software: Undeadline (MSX-2 en MSX-2+)". MSX Gids (in Dutch). No. 27. Uitgeverij Herps. March–April 1990. p. 44. https://archive.org/details/MSXGidsNr27/page/n45/mode/1up
Kageyama, Hiroaki (November 1990). "The Softouch Special - Game Review: 幻獣鬼 - ステージが選べるアクションゲーム". Oh!X [ja] (in Japanese). No. 93. SoftBank Creative. pp. 40–41. https://archive.org/details/OhX1990-1995/Oh%21X_1990-11/page/n41/mode/2up
"Console Connexions: Undead Line (Mega Drive)". Games-X. No. 38. Europress. January 16–22, 1992. p. 26. https://retrocdn.net/index.php?title=File:GamesX_UK_38.pdf&page=26
Butt, Damian (February 1992). "ProReview - Mega Drive: Undeadline (Import)". Sega Pro. No. 4. Paragon Publishing. p. 58. https://archive.org/details/segapro04/page/n57/mode/1up
Patterson, Mark; Glancey, Paul (March 1992). "Undeadline Review". MegaTech. No. 3. EMAP. pp. 44–46. https://retrocdn.net/index.php?title=File%3AMegaTech_UK_03.pdf&page=44
"Software A-Z - Mega Drive: Undeadline". Console XS. No. 1. Paragon Publishing. May 1992. p. 136. https://archive.org/details/console-xs-01/page/136/mode/1up
Lineham, Graham (May 1992). "Import Review - Mega Drive: Undeadline". Game Zone. Vol. 1, no. 7. Dennis Publishing. pp. 61–62. https://archive.org/details/game-zone-07/page/61/mode/1up