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
- 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 3910 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

7161 – Back B

April 21, 2026April 21, 2026 Master Builder

Book 250 – Page 44-45

September 30, 2025October 16, 2025 Master Builder

1728 (6145) – Back D

August 1, 2023August 1, 2023 Master Builder

7411 – Back A

December 16, 2025December 16, 2025 Master Builder

6289 – Back C

July 13, 2021July 13, 2021 Master Builder

6388 – Back B

July 1, 2022July 1, 2022 Master Builder

EXPLORE MORE OFFICIAL SETS

Episode II Episode IV/V/VI Medium Builds Official Sets Star Wars Star Wars Sets

4500: Rebel Snowspeeder

April 9, 2020April 9, 2020 Master Builder

Year Released: 2003202 PiecesBricklink

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

7302 (1416, Kabaya: Life On Mars 2): Worker Robot

February 25, 2025February 25, 2025 Master Builder

ABCs Bjarne Tveskov Extra Large Builds Futron Sets Futuron Official Sets Space

6990: Futuron Monorail Transport System

August 30, 2020February 12, 2025 Master Builder

Basic Extra Large Builds Official Sets Universal Building Set

725: Basic Building Set

July 22, 2024July 22, 2024 Master Builder

Launch Command Official Sets Recreation Town Town Sets Very Small Builds

6516: Moon Walker

April 9, 2020April 9, 2020 Master Builder

Official Sets Small Builds Time Cruisers Time Cruisers Sets

6495: Time Tunnelator

July 14, 2021July 14, 2021 Master Builder

Chamber of Secrets Extra Large Builds Harry Potter Harry Potter Sets Official Sets

4730: The Chamber of Secrets

January 23, 2024January 23, 2024 Master Builder

Medium Builds Official Sets Western Western Sets

6764: Sheriff’s Lock-Up

September 1, 2024September 1, 2024 Master Builder

M:Tron M:Tron Sets Official Sets Space Very Small Builds

6811: Pulsar Charger

April 17, 2020April 17, 2020 Master Builder

Medium Builds Official Sets Pirates Pirates I Pirates Sets

6249: Pirates Ambush

November 16, 2019February 20, 2025 Master Builder

Episode III Official Sets Small Builds Star Wars Star Wars Sets

7255: General Grievous Chase

March 2, 2023March 2, 2023 Master Builder

Official Sets Small Builds Town Town Sets

1665: Duel FX Racers

April 30, 2024April 30, 2024 Master Builder

Hospital LEGOLAND Medium Builds Official Sets

770: Rescue Set

September 15, 2022February 14, 2024 Master Builder

Castle Castle Sets Lion Knights Official Sets Small Builds

6040: Blacksmith Shop

October 8, 2023October 8, 2023 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds

6825: Cosmic Comet

September 12, 2019March 18, 2024 Master Builder

ABCs Jørn Thomsen Medium Builds Official Sets Spyrius Spyrius Sets

6939: Saucer Centurion

November 9, 2019October 1, 2024 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
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.