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

Unitron Sets

Official Sets Small Builds Space Spyrius Spyrius Sets Unitron Unitron Sets 

1785: Introducing Crater Critters

December 28, 2021December 28, 2021 Master Builder 6220 Views

Year Released: 1995BricklinkInstructions

Read more
Large Builds Official Sets Space Unitron Unitron Sets 

1793: Space Station Zenon

April 19, 2021April 19, 2021 Master Builder 7598 Views

Year Released: 1995Bricklink

Read more
Medium Builds Official Sets Space Unitron Unitron Sets 

1789: Star Hawk II

July 18, 2020July 18, 2020 Master Builder 7483 Views

Year Released: 1995InstructionsBricklink

Read more
Medium Builds Official Sets Space Unitron Unitron Sets 

1787: Crater Cruiser

April 9, 2020July 18, 2020 Master Builder 6920 Views

Year Released: 1995InstructionsBricklink

Read more
Extra Large Builds Jørn Thomsen Official Sets Space Unitron Unitron Sets 

6991: Monorail Transport Base

September 28, 2019July 29, 2023 Master Builder 9087 Views

Year Released: 1994Designer: Jørn ThomsenBricklinkInstructions

Read more

EXPLORE MORE OFFICIAL SETS

6085: Black Monarch’s Castle
Black Knights Castle Castle Sets Extra Large Builds Niels Milan Pedersen Official Sets 

6085: Black Monarch’s Castle

July 13, 2021July 29, 2023 Master Builder

Year Released: 1988Designer: Niels Milan PedersenBricklinkInstructions

7153: Jango Fett’s Slave I
Episode II Large Builds Official Sets Star Wars Star Wars Sets 

7153: Jango Fett’s Slave I

May 10, 2022May 10, 2022 Master Builder
1731 (1711, Kabaya: Space 4): Ice Planet Scooter
Ice Planet 2002 Ice Planet 2002 Sets Jørn Thomsen Official Sets Space Very Small Builds 

1731 (1711, Kabaya: Space 4): Ice Planet Scooter

April 6, 2020March 10, 2025 Master Builder
6670: Rescue Rig
Classic Town Official Sets Small Builds Town Town Sets Wrecker 

6670: Rescue Rig

November 19, 2020November 19, 2020 Master Builder
6074: Black Falcon’s Fortress
Black Falcons Castle Castle Sets Daniel August Krentz Large Builds Official Sets 

6074: Black Falcon’s Fortress

October 14, 2021July 29, 2023 Master Builder
6972: Polaris I Space Lab
Classic Space Classic Space Sets Large Builds Official Sets 

6972: Polaris I Space Lab

September 12, 2019November 21, 2023 Master Builder
6100: Aquashark Dart
Aquashark Aquazone Aquazone Sets Official Sets Very Small Builds 

6100: Aquashark Dart

March 20, 2023March 21, 2023 Master Builder
6080: King’s Castle
ABCs Castle Castle Sets Extra Large Builds Lion Knights Niels Milan Pedersen Official Sets 

6080: King’s Castle

October 5, 2019August 16, 2023 Master Builder
1793: Space Station Zenon
Large Builds Official Sets Space Unitron Unitron Sets 

1793: Space Station Zenon

April 19, 2021April 19, 2021 Master Builder
7127: Imperial AT-ST
Episode IV/V/VI Official Sets Small Builds Star Wars Star Wars Sets 

7127: Imperial AT-ST

December 29, 2021December 29, 2021 Master Builder
5847: Surfers’ Paradise
Belville Belville Sets Lion Knights Medium Builds Official Sets Recreation 

5847: Surfers’ Paradise

April 2, 2025April 2, 2025 Master Builder
1580: Lunar Scout
Classic Space Classic Space Sets Official Sets Small Builds Space 

1580: Lunar Scout

July 12, 2021July 12, 2021 Master Builder
8675: Outdoor Challenger
Official Sets Racers Radio Control Small Builds 

8675: Outdoor Challenger

July 15, 2024July 15, 2024 Master Builder
1858: Droid Scout
Exploriens Exploriens Sets Official Sets Space Very Small Builds 

1858: Droid Scout

July 8, 2022July 8, 2022 Master Builder
4565: Freight and Crane Railway
9V Extra Large Builds Official Sets Town Train Train Sets 

4565: Freight and Crane Railway

January 5, 2026January 5, 2026 Master Builder
6611: Fire Chief’s Car
Classic Town Fire Official Sets Town Town Sets Very Small Builds 

6611: Fire Chief’s Car

February 20, 2024February 20, 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
  • 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.