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
Alternate Builds Blacktron Blacktron Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added 

6987 – Back D

February 24, 2022March 17, 2022 Master Builder 4894 Views

From: 6987: Message Intercept Base
Name: Message Debugging Unit 1
Instructions: View PDF | Download .io File

Contributions

  1. Name, PDF, and .io file submitted on February 24, 2022 by: Valdis
  • ← 6886 – Back A
  • 6027 – Back C →

You May Also Like

6234 – Back B

May 23, 2022June 6, 2022 Master Builder

1728 (6145) – Back C

August 1, 2023August 1, 2023 Master Builder

6903 – Back B

October 4, 2024October 4, 2024 Master Builder

5948 – Back B

October 8, 2024October 8, 2024 Master Builder

6716 – Back A

November 20, 2023November 29, 2023 Master Builder

6823 – Back C

September 30, 2019October 25, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

1752: Boat with Armor
Castle Castle Sets Official Sets Royal Knights Very Small Builds 

1752: Boat with Armor

April 10, 2023April 10, 2023 Master Builder

Year Released: 1996BricklinkInstructions

1896: Trauma Team
Classic Town Hospital Large Builds Official Sets Town Town Sets 

1896: Trauma Team

April 4, 2022April 4, 2022 Master Builder
6834: Celestial Sled
Ice Planet 2002 Ice Planet 2002 Sets Official Sets Small Builds Space 

6834: Celestial Sled

February 9, 2021February 9, 2021 Master Builder
6990: Futuron Monorail Transport System
ABCs Bjarne Tveskov Extra Large Builds Futron Sets Futuron Official Sets Space 

6990: Futuron Monorail Transport System

August 30, 2020February 12, 2025 Master Builder
6848: Strategic Pursuer
Bjarne Tveskov Duplicate Set Number Futron Sets Futuron Official Sets Small Builds Space 

6848: Strategic Pursuer

April 16, 2021March 11, 2024 Master Builder
6481: Construction Crew
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6481: Construction Crew

April 9, 2020July 4, 2022 Master Builder
4720: Knockturn Alley
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4720: Knockturn Alley

July 9, 2024July 9, 2024 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
6267: Lagoon Lock-Up
Daniel August Krentz Imperial Soldiers Medium Builds Official Sets Pirates Pirates I Pirates Sets 

6267: Lagoon Lock-Up

October 11, 2021July 29, 2023 Master Builder
6066: Camouflaged Outpost
Castle Castle Sets Forestmen Medium Builds Niels Milan Pedersen Official Sets 

6066: Camouflaged Outpost

October 11, 2021July 29, 2023 Master Builder
6386: Police Command Base
Box Marketing Blurb Classic Town Large Builds Official Sets Police Town Town Sets 

6386: Police Command Base

February 4, 2021April 3, 2024 Master Builder
6885: Saturn Base Main Team (Crater Crawler)
Futron Sets Futuron Official Sets Small Builds Space 

6885: Saturn Base Main Team (Crater Crawler)

December 28, 2021December 28, 2021 Master Builder
6592: Vacation Hideaway (Weekend Cottage)
Building Classic Town Official Sets Small Builds Town Town Sets 

6592: Vacation Hideaway (Weekend Cottage)

June 23, 2025June 23, 2025 Master Builder
6281: Pirates Perilous Pitfall
Box Story Large Builds Official Sets Pirates Pirates I Pirates Sets 

6281: Pirates Perilous Pitfall

February 21, 2025February 21, 2025 Master Builder
6086: Black Knight’s Castle
Black Knights Castle Castle Sets Extra Large Builds Niels Milan Pedersen Official Sets 

6086: Black Knight’s Castle

October 11, 2021July 29, 2023 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

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.