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
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Ninja
    • Pirates
    • Rock Raiders
    • Space
    • Star Wars
    • Studios
    • Technic
    • Time Cruisers
    • Town
    • Universal Building Set
    • Western
    • Misc
  • USEFUL LINKS
    • Contribute!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • About
  • 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 2314 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 2989 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 3519 Views

Year Released: 1995InstructionsBricklink

Read more
Medium Builds Official Sets Space Unitron Unitron Sets 

1787: Crater Cruiser

April 9, 2020July 18, 2020 Master Builder 2860 Views

Year Released: 1995InstructionsBricklink

Read more
Extra Large Builds Official Sets Unitron Unitron Sets 

6991: Monorail Transport Base

September 28, 2019September 28, 2019 Master Builder 4130 Views

Year Released: 1994Bricklink

Read more

EXPLORE MORE OFFICIAL SETS

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

6085: Black Monarch’s Castle

July 13, 2021July 13, 2021 Master Builder

Year Released: 1988BricklinkInstructions

6545: Search N’ Rescue
Classic Town Large Builds Official Sets Police Town Town Sets 

6545: Search N’ Rescue

June 2, 2022June 2, 2022 Master Builder
924 (487): Space Cruiser
Classic Space Classic Space Sets Medium Builds Official Sets Space 

924 (487): Space Cruiser

January 25, 2022January 25, 2022 Master Builder
4950: Loader-Dozer
Official Sets Rock Raiders Rock Raiders Sets Small Builds 

4950: Loader-Dozer

November 10, 2019December 16, 2019 Master Builder
6972: Polaris I Space Lab
Classic Space Classic Space Sets Large Builds Official Sets 

6972: Polaris I Space Lab

September 12, 2019September 28, 2019 Master Builder
6074: Black Falcon’s Fortress
Black Falcons Castle Castle Sets Large Builds Official Sets 

6074: Black Falcon’s Fortress

October 14, 2021October 14, 2021 Master Builder
6077-2: Forestmen’s River Fortress
Castle Castle Sets Forestmen Large Builds Official Sets 

6077-2: Forestmen’s River Fortress

April 19, 2021February 2, 2022 Master Builder
1590-2: ANWB Breakdown Assistance
Classic Town Large Builds Official Sets Town Town Sets Traffic 

1590-2: ANWB Breakdown Assistance

October 22, 2021October 22, 2021 Master Builder
6970: Beta-1 Command Base
Classic Space Classic Space Sets Large Builds Official Sets Space 

6970: Beta-1 Command Base

January 20, 2021January 20, 2021 Master Builder
6673: Solo Trainer
Airport Classic Town Medium Builds Official Sets Town Town Sets 

6673: Solo Trainer

November 18, 2020November 18, 2020 Master Builder
6987: Message Intercept Base
Blacktron Blacktron Sets Extra Large Builds Official Sets 

6987: Message Intercept Base

September 12, 2019June 28, 2022 Master Builder
6837: Cosmic Creeper
Insectoids Insectoids Sets Official Sets Small Builds 

6837: Cosmic Creeper

April 2, 2020April 2, 2020 Master Builder
1843 – Side R
Castle Castle Alternate Builds Instructions Added Official Sets Royal Knights Small Alt Build Small Builds Space Spyrius Spyrius Sets Value Packs 

1843 – Side R

January 22, 2021October 25, 2021 Master Builder
6251: Pirate Mini Figures (Sea Mates)
Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

6251: Pirate Mini Figures (Sea Mates)

April 9, 2020April 9, 2020 Master Builder
6245: Harbor Sentry
Imperial Soldiers Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

6245: Harbor Sentry

July 13, 2021July 13, 2021 Master Builder
4707: Hagrid’s Hut
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4707: Hagrid’s Hut

December 29, 2021December 29, 2021 Master Builder

BUILD!

MINIFIGS

About This Site

Logo
There were once pictures of additional builds on the back of LEGO® boxes. On the box was, "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
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Ninja
  • Pirates
  • Rock Raiders
  • Space
  • Star Wars
  • Studio
  • Technic
  • Time Cruisers
  • Town
  • Universal Building Set
  • Western
  • Misc

Useful Links

  • Contribute!
  • 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)
  • About

In Honor of 1526

The classic space set that never was.

Copyright © 2023 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.