Skip to content
Back of the Box Builds

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
    • 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 Grey:tron Grøntrøn Space 

Greytron

February 11, 2025February 11, 2025 Master Builder 5190 Views

Misc
Theme: Greytron (Not Official)

BrickJournal: Issue 6 Volume 2 – Page 42
TwoMorrows Publishing
Photo Credit: Niels Milan Pedersen’s personal LEGO archives

LEGO® Space: 1978-1992 – Page 156
Published: 2023
By: Tim Johnson
Dark Horse Books

Name: TBD
Submitted By: USER
Instructions:

  • ← 6713 – Back B
  • Aquadome →

You May Also Like

6831 – Back B

May 3, 2020November 18, 2021 Master Builder

6802 – Back C

October 10, 2022October 10, 2022 Master Builder

2151: Robo Raider

January 14, 2021September 3, 2025 Master Builder

1787: Crater Cruiser

April 9, 2020July 18, 2020 Master Builder

1731 – Back C

April 6, 2020August 1, 2023 Master Builder

920 – Back E

February 2, 2021October 25, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

6335: Indy Transport
Classic Town Medium Builds Official Sets Race Town Town Sets 

6335: Indy Transport

November 29, 2023November 29, 2023 Master Builder

Year Released: 1996BricklinkInstructions

6034: Black Monarch’s Ghost
Black Knights Castle Castle Sets Official Sets Very Small Builds 

6034: Black Monarch’s Ghost

January 16, 2022January 16, 2022 Master Builder
6054: Forestmen’s Hideout
Castle Castle Sets Forestmen Medium Builds Niels Milan Pedersen Official Sets 

6054: Forestmen’s Hideout

April 10, 2021July 29, 2023 Master Builder
6872: Xenon X-Craft
Classic Space Classic Space Sets Official Sets Small Builds 

6872: Xenon X-Craft

October 19, 2019October 19, 2019 Master Builder
6285: Black Seas Barracuda
Box Story Extra Large Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets 

6285: Black Seas Barracuda

August 3, 2023February 20, 2025 Master Builder
1626: Angel Polybag
Holiday and Event Holiday and Event Sets Official Sets Very Small Builds 

1626: Angel Polybag

March 4, 2023March 4, 2023 Master Builder
6392: Airport
ABCs Airport Classic Town Extra Large Builds Official Sets Town Town Sets 

6392: Airport

June 28, 2022August 16, 2023 Master Builder
1974-2: Flyercracker USA
Airport Bonus/Value Pack Sets Classic Town Official Sets Small Builds Town 

1974-2: Flyercracker USA

September 7, 2023September 8, 2023 Master Builder
6280: Armada Flagship
Box Story Imperial Armada Large Builds Official Sets Pirates Pirates I Pirates Sets 

6280: Armada Flagship

July 13, 2021February 20, 2025 Master Builder
6336: Launch Response Unit
Launch Command Medium Builds Official Sets Town Town Sets 

6336: Launch Response Unit

July 12, 2021July 12, 2021 Master Builder
1722: Rescue/Ice Planet Combo Pack
Bonus/Value Packs Classic Town Fire Ice Planet 2002 Ice Planet 2002 Sets Official Sets Small Builds Space Town 

1722: Rescue/Ice Planet Combo Pack

July 13, 2021April 4, 2024 Master Builder
7043: Firefighter
Fire Official Sets Small Builds Town Town Sets World City 

7043: Firefighter

January 22, 2024January 22, 2024 Master Builder
886: Space Buggy
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

886: Space Buggy

January 25, 2024January 25, 2024 Master Builder
7133: Bounty Hunter Pursuit
Episode II Large Builds Official Sets Star Wars Star Wars Sets 

7133: Bounty Hunter Pursuit

July 14, 2021July 14, 2021 Master Builder
1843 – Side R
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 R

January 22, 2021March 14, 2025 Master Builder
6125: Sea Sprint 9
Aquanauts Aquazone Aquazone Sets Jørn Thomsen Official Sets Very Small Builds 

6125: Sea Sprint 9

April 9, 2020July 29, 2023 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
  • 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 © 2025 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.