Skip to content
Back of the Box Builds

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
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP
Concepts and Prototypes Space 

Alien Prototype

February 23, 2023February 12, 2025 Master Builder 7230 Views

Misc
Theme: Space

BrickJournal: Issue 6 Volume 2 – Page 41
TwoMorrows Publishing
Photo Credit: Niels Milan Pedersen’s personal LEGO archives

Build: TBD
Submitted By: USER
Instructions

  • ← Space Police II Concept
  • BrickJournal Issue 6 Volume 2 Page 42 – Concept 1 →

You May Also Like

6805 – Back C

December 10, 2025December 10, 2025 Master Builder

Spearhead

March 14, 2025April 10, 2025 Master Builder

6807 – Back A

November 21, 2023November 21, 2023 Master Builder

1875 – Back A

October 11, 2021September 7, 2023 Master Builder

6770 – Back A

September 11, 2023September 11, 2023 Master Builder

6834 – Back A

February 9, 2021November 3, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

6497: Twisted Time Train
Box Story Medium Builds Official Sets Time Cruisers Time Cruisers Sets 

6497: Twisted Time Train

March 17, 2025March 17, 2025 Master Builder

Year Released: 1997BricklinkInstructions The box reads, “Beware, the LEGO SYSTEM™ Time Twisters are traveling through the LEGO® universe in search of treasures to

5580: Highway Rig
Extra Large Builds Model Team Model Team Sets Official Sets 

5580: Highway Rig

February 9, 2026February 9, 2026 Master Builder
6245: Harbor Sentry
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
4708: Hogwarts Express
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4708: Hogwarts Express

July 13, 2021August 8, 2024 Master Builder
4733: The Dueling Club
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4733: The Dueling Club

March 3, 2023March 3, 2023 Master Builder
6596: Wave Master
Classic Town Harbor Medium Builds Official Sets Town Town Sets Wrecker 

6596: Wave Master

September 15, 2022September 15, 2022 Master Builder
6289: Red Beard Runner
Extra Large Builds Official Sets Pirates Pirates I Pirates Sets 

6289: Red Beard Runner

July 13, 2021July 13, 2021 Master Builder
6991: Monorail Transport Base
Extra Large Builds Jørn Thomsen Official Sets Space Unitron Unitron Sets 

6991: Monorail Transport Base

September 28, 2019July 29, 2023 Master Builder
2963: Extreme Racer
Extreme Team Official Sets Small Builds Town Town Sets 

2963: Extreme Racer

January 30, 2024January 30, 2024 Master Builder
1818: Aircraft and Ground Support Equipment and Vehicle
Airport Classic Town Medium Builds Official Sets Town Town Sets 

1818: Aircraft and Ground Support Equipment and Vehicle

April 7, 2025April 7, 2025 Master Builder
7704: Sonic Phantom
Exo-Force Medium Builds Official Sets 

7704: Sonic Phantom

April 28, 2023April 28, 2023 Master Builder
6716: Weapons Wagon
Cowboys Jørn Thomsen Official Sets Small Builds Western Western Sets 

6716: Weapons Wagon

April 2, 2022July 29, 2023 Master Builder
6030: Catapult
Black Falcons Castle Castle Sets Official Sets Small Builds 

6030: Catapult

April 2, 2022April 2, 2022 Master Builder
6984: Galactic Mediator
ABCs Box Marketing Blurb Jørn Thomsen Large Builds Official Sets Space Space Police II Space Police II Sets 

6984: Galactic Mediator

March 18, 2022June 23, 2025 Master Builder
7300 (1414, 7308, Kabaya: Life On Mars 1): Double Hover
Life on Mars Life on Mars Sets Official Sets Very Small Builds 

7300 (1414, 7308, Kabaya: Life On Mars 1): Double Hover

February 24, 2025February 25, 2025 Master Builder
6735: Air Chase
Island Xtreme Stunts Island Xtreme Stunts Sets Medium Builds Official Sets 

6735: Air Chase

April 7, 2026April 7, 2026 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
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.