Skip to content

Back of the Box Builds

LEGO Alternate Builds!

SETS
- Adventurers
- Aquazone
- 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
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Bonus/Value Pack Alternate Builds Castle Castle Alternate Builds Instructions Added Official Sets Royal Knights Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds

1843 – Side L

January 22, 2021March 14, 2025 Master Builder 5321 Views

From: 1843: Space / Castle Value Pack
Name: Space / Castle Secret Armory ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF, and .io file submitted on January 29, 2021 by: Mr.AstonishedRaccoon

← 1843: Space/Castle Value Pack
1843 – Side R →

You May Also Like

1818 – Back C

April 7, 2025April 7, 2025 Master Builder

4704 – Back B

May 28, 2024May 30, 2024 Master Builder

4709 – Back B

June 12, 2024June 17, 2024 Master Builder

6957 – Back A

June 6, 2022August 25, 2023 Master Builder

4733 – Back B

March 3, 2023March 3, 2023 Master Builder

6835 – Back C

November 9, 2019December 27, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Box Marketing Blurb Classic Town Large Builds Official Sets Police Town Town Sets

6386: Police Command Base

February 4, 2021April 3, 2024 Master Builder

Year Released: 1986BricklinkInstructions The box reads, “Creativity and Quality Craftsmanship are the key ingredients in this and all LEGO® brand building

Bjarne Tveskov Different Box Versions Futron Sets Futuron Official Sets Small Builds

6884: Aero-Module

September 24, 2019March 17, 2024 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

Official Sets Space Port Town Very Small Builds

3067 (Kabaya: Town Space Port 2): Test Shuttle

February 28, 2025February 28, 2025 Master Builder

Bonus/Value Pack Sets Bonus/Value Packs Ice Planet 2002 Ice Planet 2002 Sets Medium Builds Official Sets Space

Ice Planet 2002 Value Pack (VP-1)

March 7, 2026March 7, 2026 Master Builder

Large Builds LEGOLAND Official Sets Space

565: Moon Landing

July 11, 2024July 11, 2024 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Traffic

6649: Street Sweeper

July 8, 2022July 8, 2022 Master Builder

Box Story Duplicate Set Number Medium Builds Ninja Ninja Alternate Builds Ninja Official Sets Official Sets

6083-2: Samurai Stronghold

December 16, 2025December 16, 2025 Master Builder

Official Sets Race Town Town Sets Very Small Builds

6604: Formula-1 Racer

November 25, 2020November 25, 2020 Master Builder

Bjarne Tveskov Official Sets Space Space Police I Space Police I Sets Very Small Builds

6831: Message Decoder

May 3, 2020July 29, 2023 Master Builder

Bonus/Value Packs Futron Sets Futuron Official Sets Small Builds Space

1616: Space Combi-Pack

September 6, 2023September 6, 2023 Master Builder

Castle Castle Sets Lion Knights Medium Builds Official Sets

6041: Armor Shop

September 25, 2024September 25, 2024 Master Builder

Imperial Soldiers Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets Very Small Builds

6245: Harbor Sentry

July 13, 2021July 29, 2023 Master Builder

Extra Large Builds Model Team Model Team Sets Official Sets

5581: Magic Flash

January 2, 2024January 2, 2024 Master Builder

Divers Official Sets Small Builds Town Town Sets

6556: Scuba Squad

June 28, 2022June 28, 2022 Master Builder

Imperial Armada Official Sets Pirates Pirates Sets Small Builds

6244: Armada Sentry

November 16, 2019April 4, 2020 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
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.