Alex Kidd in Miracle World

Plot: 'A young martial artist named Alex Kidd learns of a villain named Janken the Great who has defeated King Thunder of the city of Radaxian and who has kidnapped his son, Prince Egle (or Igul), and Egle's fiancée Princess Lora. Discovering that he is the lost son of King Thunder, Alex sets out to rescue the kingdom.'

The very first entry in the Alex Kidd series. A 2021 remake for 8th/9th gen platforms and PC exists which carries the DX in its name. At the end I show alternate routes for a few stages, all of them being in the underwater.

00:00 - Start
00:16 - Stage 1: Mt. Eternal
03:01 - Stage 2: Mt. Eternal II
05:02 - Stage 3: Lake Fathom
07:06 - Stage 4: Island of St. Nurari
08:16 - Stage 5: Lake Fathom II
09:53 - Stage 6: Village of Namui
12:21 - Stage 7: Mt. Kave
15:16 - Stage 8: The Blakwoods
16:10 - Stage 9: River
16:49 - Stage 10: Bingoo Lowland
19:00 - Stage 11: The Radaxian Castle
23:44 - Stage 12: The City of Radaxian
25:24 - Stage 13: Swamp
26:02 - Stage 14: The Kingdom of Nibana
26:20 - Stage 15: The Kingdom of Nibana II
28:04 - Stage 16: Janken's Castle
35:20 - Stage 17:Cragg Lake
36:12 - Ending

37:07 - Stage 3 (Alternate)
38:08 - Stage 5 (Alternate)
38:48 - Stage 9 (Alternate)