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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

Unitron

Alternate Builds Instructions Added Large Alt Build Large Builds Space Unitron Unitron Alternate Builds 

1793 – Back C

August 31, 2024September 6, 2024 Master Builder 3018 Views

From: 1793: Space Station ZenonName: Zenon Laboratory Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Large Alt Build Large Builds Space Unitron Unitron Alternate Builds 

1793 – Back B

July 30, 2024August 8, 2024 Master Builder 2467 Views

From: 1793: Space Station ZenonName: Zenon CPU Factory Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Large Alt Build Large Builds Space Unitron Unitron Alternate Builds 

1793 – Back A

June 30, 2024September 6, 2024 Master Builder 3015 Views

From: 1793: Space Station ZenonName: Unitron Summer House Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Unitron Unitron Alternate Builds 

1789 – Back A

January 16, 2024January 17, 2024 Master Builder 4012 Views

From: 1789: Star Hawk IIName: Star Spinner Instructions: View PDF

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Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Unitron Unitron Alternate Builds 

1787 – Back C

October 5, 2023October 10, 2023 Master Builder 2158 Views

From: 1787: Crater CruiserName: Crater Twins Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Unitron Unitron Alternate Builds 

1787 – Back B

September 14, 2023September 18, 2023 Master Builder 2680 Views

From: 1787: Crater CruiserName: Crater DJ Outpost Instructions: View PDF | Download .io File

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ABCs Commercials Instructions Added Space Spyrius Unitron Unitron Alternate Builds 

1994 Unitron and Spyrius Commercial

August 16, 2023August 18, 2023 Master Builder 4386 Views

MiscFeatured: 6991: Monorail Transport Base, 6939: Saucer Centurion, 6949: Robo-Guardian, 6889: Recon Robot Build: Unitron Alarm Tower Instructions: View PDF

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Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Unitron Unitron Alternate Builds 

1787 – Back A

June 28, 2023June 30, 2023 Master Builder 3765 Views

From: 1787: Crater CruiserName: Asymmetrical Rover Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds Unitron Unitron Alternate Builds 

1785 – Back C

April 8, 2022May 10, 2022 Master Builder 3047 Views

From: 1785: Introducing Crater CrittersName: Looky Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds Unitron Unitron Alternate Builds 

1785 – Back B

April 8, 2022May 10, 2022 Master Builder 3351 Views

From: 1785: Introducing Crater CrittersName: Grabby Instructions: View PDF | Download .io File

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Alternate Builds Instructions Added Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds Unitron Unitron Alternate Builds 

1785 – Back A

April 8, 2022May 10, 2022 Master Builder 3358 Views

From: 1785: Introducing Crater CrittersName: Tasty Instructions: View PDF | Download .io File

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Official Sets Small Builds Space Spyrius Spyrius Sets Unitron Unitron Sets 

1785: Introducing Crater Critters

December 28, 2021December 28, 2021 Master Builder 4767 Views

Year Released: 1995BricklinkInstructions

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Large Builds Official Sets Space Unitron Unitron Sets 

1793: Space Station Zenon

April 19, 2021April 19, 2021 Master Builder 5901 Views

Year Released: 1995Bricklink

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Alternate Builds Medium Builds Space Unitron Unitron Alternate Builds 

1789 – Back C

July 18, 2020July 18, 2020 Master Builder 2671 Views

From: 1789: Star Hawk IIName: TBDSubmitted by: USERInstructions

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Alternate Builds Medium Builds Space Unitron Unitron Alternate Builds 

1789 – Back B

July 18, 2020July 18, 2020 Master Builder 2343 Views

From: 1789: Star Hawk IIName: TBDSubmitted by: USERInstructions

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Medium Builds Official Sets Space Unitron Unitron Sets 

1789: Star Hawk II

July 18, 2020July 18, 2020 Master Builder 6108 Views

Year Released: 1995InstructionsBricklink

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Medium Builds Official Sets Space Unitron Unitron Sets 

1787: Crater Cruiser

April 9, 2020July 18, 2020 Master Builder 5433 Views

Year Released: 1995InstructionsBricklink

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Alternate Builds Extra Large Builds Unitron Unitron Alternate Builds 

6991 – Back D

September 28, 2019September 28, 2019 Master Builder 2514 Views

From: 6991: Monorail Transport BaseName: TBDSubmitted by: USERInstructions

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Alternate Builds Extra Large Builds Unitron Unitron Alternate Builds 

6991 – Back C

September 28, 2019September 28, 2019 Master Builder 2478 Views

From: 6991: Monorail Transport BaseName: TBDSubmitted by: USERInstructions

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Alternate Builds Extra Large Builds Unitron Unitron Alternate Builds 

6991 – Back B

September 28, 2019September 28, 2019 Master Builder 2964 Views

From: 6991: Monorail Transport BaseName: TBDSubmitted by: USERInstructions

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Alternate Builds Extra Large Builds Unitron Unitron Alternate Builds 

6991 – Back A

September 28, 2019September 28, 2019 Master Builder 2956 Views

From: 6991: Monorail Transport BaseName: TBDSubmitted by: USERInstructions

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Extra Large Builds Jørn Thomsen Official Sets Space Unitron Unitron Sets 

6991: Monorail Transport Base

September 28, 2019July 29, 2023 Master Builder 6967 Views

Year Released: 1994Designer: Jørn ThomsenBricklinkInstructions

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EXPLORE MORE OFFICIAL SETS

3152: Playroom for the Baby Thomas
Official Sets Scala Scala Alternate Builds Scala Sets Small Builds 

3152: Playroom for the Baby Thomas

July 10, 2024July 10, 2024 Master Builder

Year Released: 2000Bricklink

6808: Galaxy Trekkor
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

6808: Galaxy Trekkor

January 21, 2021January 21, 2021 Master Builder
1491: Dual Defender
Black Knights Castle Castle Sets Official Sets Small Builds 

1491: Dual Defender

October 11, 2021October 11, 2021 Master Builder
6235: Buried Treasure
Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

6235: Buried Treasure

May 23, 2022May 23, 2022 Master Builder
6848: Interplanetary Shuttle
Classic Space Classic Space Sets Duplicate Set Number Official Sets Small Builds Space 

6848: Interplanetary Shuttle

March 11, 2024March 11, 2024 Master Builder
6897: Rebel Hunter
ABCs Jørn Thomsen Medium Builds Official Sets Space Space Police II Space Police II Sets 

6897: Rebel Hunter

January 23, 2022February 11, 2025 Master Builder
6829: Radon Rover
ABCs Official Sets Small Builds Space UFO UFO Sets 

6829: Radon Rover

August 4, 2020March 22, 2025 Master Builder
7130: Snowspeeder
Episode IV/V/VI Medium Builds Official Sets Star Wars Star Wars Sets 

7130: Snowspeeder

June 28, 2022June 28, 2022 Master Builder
6495: Time Tunnelator
Official Sets Small Builds Time Cruisers Time Cruisers Sets 

6495: Time Tunnelator

July 14, 2021July 14, 2021 Master Builder
4482: AT-TE
Episode II Extra Large Builds Official Sets Star Wars Star Wars Sets 

4482: AT-TE

April 9, 2020April 9, 2020 Master Builder
1963: Basic Set with Storage Case
Basic Box Plus Large Builds Official Sets Storage Container Universal Building Set 

1963: Basic Set with Storage Case

October 9, 2024October 9, 2024 Master Builder
1621: Lunar MPV Vehicle
Bonus/Value Pack Sets Futron Sets Futuron Jørn Thomsen Official Sets Small Builds Space 

1621: Lunar MPV Vehicle

September 6, 2023September 7, 2023 Master Builder
6810: Laser Ranger
Bjarne Tveskov Futron Sets Futuron Official Sets Very Small Builds 

6810: Laser Ranger

September 25, 2019July 29, 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
775: Fire Fighter Ship
Boat Fire Medium Builds Official Sets 

775: Fire Fighter Ship

July 22, 2024July 22, 2024 Master Builder
1628: Santa on Sleigh with Reindeer
Holiday and Event Holiday and Event Sets Official Sets Small Builds 

1628: Santa on Sleigh with Reindeer

November 25, 2020July 25, 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.