Super Mario Bros.: The Lost Levels · NES Classics

Worlds 1–8, World 9, and A–D

This is Super Mario Bros.: The Lost Levels on NES – Nintendo Classics: original-style 8-bit, not Super Mario All-Stars and not Super Mario Bros. Deluxe. It is not USA Super Mario Bros. 2. Worlds 1–8 are the numbered game. World 9 needs a no-warp 8-4. Worlds A–D use a version-split unlock — NSO presence is labeled, not guessed.

How to use this: Play 1-1 through 8-4. Skip Warp Zones if you want World 9. Only open A–D if your listing actually offers them.

Not in this walkthrough: USA SMB2 (potions, Subcon), All-Stars-only sequential A–D as if it were NSO fact, Deluxe (no letter worlds), glitch Minus Worlds, or prices.

Version: Original-style 8-bit Lost Levels on Nintendo Entertainment System – Nintendo Classics (not All-Stars, not Deluxe)

Last checked: 2026-09-11

Start World 1-1 Hub Warp Zones Secrets

World 1

Looks like Super Mario Bros. It is not. Poison mushrooms and nastier jumps start immediately.

Open World 1

World 1-1Overworld World 1-2Underground World 1-3Athletic World 1-4Castle · Impostor Bowser

World 2

Harder overworld and water. Poison still looks friendly on 8-bit.

Open World 2

World 2-1Overworld World 2-2Underwater World 2-3Athletic World 2-4Castle · Impostor Bowser

World 3

Reverse Warp Zone in 3-1 can send you back to 1-1. That is intended, not a glitch.

Open World 3

World 3-1Overworld World 3-2Underground World 3-3Athletic World 3-4Castle · Impostor Bowser

World 4

Underground and castle pressure increase. Warps here skip ahead and cost World 9.

Open World 4

World 4-1Overworld World 4-2Underground World 4-3Athletic World 4-4Castle · Impostor Bowser

World 5

High wind athletic stages. This is where Lost Levels stops feeling like a remix.

Open World 5

World 5-1Overworld World 5-2Underground World 5-3Athletic World 5-4Castle · Impostor Bowser

World 6

Late-game overworld and water. Still four stages, still no princess.

Open World 6

World 6-1Overworld World 6-2Underwater World 6-3Athletic World 6-4Castle · Impostor Bowser

World 7

Almost the end of the numbered worlds. Maze thinking starts before 8-4.

Open World 7

World 7-1Overworld World 7-2Underground World 7-3Athletic World 7-4Castle · Impostor Bowser

World 8

The numbered game ends at 8-4. World 9 only if you did not warp. Letter worlds are a separate unlock.

Open World 8

World 8-1Overworld World 8-2Overworld World 8-3Athletic World 8-4Castle · Bowser

World 9 — Fantasy World

Secret world after a no-warp 8-4. Mostly underwater. Original-style copies loop; All-Stars may continue to A.

Open World 9 — Fantasy World

World 9-1Underwater · Unlock: no-warp 1–8 World 9-2Underwater World 9-3Castle-like World 9-4Underwater

World A

First letter world. Unlock is version-split. Not Deluxe.

Open World A

World A-1Overworld · Version-split unlock World A-2Underground World A-3Athletic World A-4Castle · Impostor Bowser

World B

Second letter world. Same unlock caveats as A.

Open World B

World B-1Overworld · Version-split unlock World B-2Underwater World B-3Athletic World B-4Castle · Impostor Bowser

World C

Third letter world.

Open World C

World C-1Overworld · Version-split unlock World C-2Underground World C-3Athletic World C-4Castle · Impostor Bowser

World D

Last letter world. D-4 is the end of A–D.

Open World D

World D-1Overworld · Version-split unlock World D-2Underground World D-3Athletic World D-4Castle · Bowser or impostor (version-split)

Version and scope notes

Nintendo Classics listing is original-style 8-bit Lost Levels. Poison mushrooms are not guaranteed to be All-Stars blue.
World 9: no-warp clear of Worlds 1–8. Loop vs continue after 9-4 is version-specific. NSO loop/continue is UNKNOWN if not independently verified.
Worlds A–D: FDS title-screen eight-star A+Start vs All-Stars sequential vs Deluxe omitted. PixelQuest has not independently verified A+Start on the current NSO listing.
USA Super Mario Bros. 2 mechanics never apply here.