Super Mario Bros. 4: The Undiscovered Zones V2
FamicomPlayable in browserNo download requiredGame Rerun review

Super Mario Bros. 4: The Undiscovered Zones V2

This route runs Super Mario Bros. 4: The Undiscovered Zones V2, a community-modified Famicom game whose title screen identifies the 2017 build and SZEMIGI. Game Rerun verified the title screen and current Player 1 keyboard map.

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563
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872

Game Rerun review

Overview

The game uses the familiar side-scrolling platform format but presents its own Undiscovered Zones V2 title and level arrangement. It should be treated as a community modification, not an official Nintendo sequel.

The hosted Famicom player reached the 2017 title screen and displayed Mario and Luigi choices before the browser key panel opened.

Controls

W / A / S / D
Move and use the emulated D-Pad
J / K
Use the emulated B / A buttons
Shift / Enter
Use Select / Start

Before you play

  • Press Enter at the title screen after choosing Mario or Luigi.
  • Use short taps near unfamiliar ledges until you learn how this version places platforms and hazards.

Known limitations

  • The hosted game and title screen use English text.
Reviewed by: Game Rerun editorial teamLast checked: Aug 2, 2026

FAQ

Is The Undiscovered Zones V2 an official Super Mario sequel?

No. The hosted title screen identifies a 2017 community build, so this page describes it as a modification rather than an official Nintendo release.

What are the browser controls?

Use WASD for the D-Pad, J and K for B and A, Shift for Select, and Enter for Start.

Which version did Game Rerun verify?

The tested player reached a title screen reading Super Mario Bros. 4 and marked 2017 SZEMIGI.

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