Skip to content

Back of the Box Builds

LEGO Alternate Builds!

SETS
- Adventurers
- Aquazone
- Belville
- BATMAN™
- BIONICLE
- Building Set with People
- Castle
- Duplo
- Fabuland
- Harry Potter
- Holiday and Event
- LEGOLAND
- Model Team
- Pirates
- Space
- Star Wars
- Technic
- Train
- Town
- Universal Building Set
- Western
- More Sets
- Misc
USEFUL LINKS
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Alternate Builds Instructions Added Space Space Police I Space Police I Alternate Builds Very Small Alt Build Very Small Builds

6831 – Back A

May 3, 2020November 18, 2021 Master Builder 4316 Views

From: 6831: Message Decoder
Name: Message Runner ¹
Instructions: View PDF | Download .io File

Contributions

PDF and .io file submitted on November 17, 2021 by: Krysto

← 6831: Message Decoder
6831 – Back B →

You May Also Like

6250 – Back C

February 20, 2025February 20, 2025 Master Builder

6706: Frontier Patrol

October 10, 2023October 10, 2023 Master Builder

6073 – Back D

October 23, 2019October 23, 2019 Master Builder

6296 – Back B

January 12, 2022January 12, 2022 Master Builder

6548 – Back B

October 12, 2021October 12, 2021 Master Builder

6397 – Back A

March 20, 2023March 22, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Episode IV/V/VI Official Sets Small Builds Star Wars Star Wars Sets

7128: Speeder Bikes

July 14, 2021July 14, 2021 Master Builder

Year Released: 1999BricklinkInstructions

Episode IV/V/VI Large Builds Official Sets Star Wars Star Wars Sets

7180: B-wing at Rebel Control Center

August 17, 2023April 21, 2026 Master Builder

Official Sets Pirates Pirates I Pirates Sets Very Small Builds

6237: Pirates’ Plunder

February 8, 2022February 8, 2022 Master Builder

Exo-Force Medium Builds Official Sets

7704: Sonic Phantom

April 28, 2023April 28, 2023 Master Builder

Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets

4720: Knockturn Alley

July 9, 2024June 23, 2026 Master Builder

Airport Classic Town Official Sets Small Builds Town Town Sets

6615: Eagle Stunt Flyer

January 5, 2022January 5, 2022 Master Builder

Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets Small Builds

6260: Shipwreck Island

April 9, 2020July 29, 2023 Master Builder

Life on Mars Life on Mars Sets Official Sets Very Small Builds

7301 (1413, 7309, Kabaya: Life On Mars 4): Rover

February 24, 2025February 25, 2025 Master Builder

Classic Town Construction Medium Builds Official Sets Town Town Sets

6481: Construction Crew

April 9, 2020July 4, 2022 Master Builder

Classic Town Construction Official Sets Town Town Sets Very Small Builds

6532: Diesel Dumper

November 19, 2020November 19, 2020 Master Builder

Jørn Thomsen Official Sets Space Space Police II Space Police II Sets Very Small Builds

1916 (Kabaya: Space 3): Starion Patrol

January 19, 2022February 25, 2025 Master Builder

Box Story Castle Castle Sets Extra Large Builds Fright Knights Official Sets

6097: Night Lord’s Castle

March 1, 2023March 17, 2025 Master Builder

Goblet of Fire Harry Potter Harry Potter Sets Large Builds Official Sets

4767: Harry and the Hungarian Horntail

May 16, 2023May 16, 2023 Master Builder

Medium Builds Official Sets Town Town Sets

6561: Hot Rod Club

November 10, 2019June 3, 2026 Master Builder

Bjarne Tveskov Blacktron II Blacktron II Sets Official Sets Space Very Small Builds

6812: Grid Trekkor

February 12, 2021July 29, 2023 Master Builder

Basic Official Sets Small Builds Universal Building Set

385-2: Build-N-Store Chest

September 8, 2025September 8, 2025 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

There were once pictures of additional LEGO® builds on the back of set boxes. Written on the boxes was typically something about the endless building possibilities, "Build any of these exciting models with this set!" There were no instructions for these alternate builds, until now.

Sets

Adventurers
Aquazone
BATMAN
Bionicle
Belville
Building Set with People
Castle
Duplo
Fabuland
Harry Potter
Holiday and Event
LEGOLAND
Model Team
Pirates
Space
Star Wars
Technic
Train
Town
Universal Building Set
Western
More Sets
Misc

Useful Links

Submit Instructions!
New Instructions
New Official Sets
New Alternate Builds
Minifigs
Very Small Builds (<35 pcs)
Small Builds (<100 pcs)
Medium Builds (<200 pcs)
Large Builds (<400 pcs)
Extra Large Builds (>400 pcs)
How BOTBB was Built

In Honor of 1526

The classic space set that never was.

Copyright © 2026 Back of the Box Builds. All rights reserved. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize, or endorse this site.