Skip to content

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
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Alternate Builds Instructions Added Medium Alt Build Medium Builds Spyrius Spyrius Alternate Builds

6939 – Back B

February 5, 2023February 13, 2023 Master Builder 4206 Views

From: 6939: Saucer Centurion
Name: Spy-star Defender ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF and .io file submitted on February 5, 2023 by: Valdis

← 6939 – Back A
6939 – Back C →

You May Also Like

6847 – Back C

January 29, 2025January 29, 2025 Master Builder

6077 – Back A

July 13, 2021July 13, 2021 Master Builder

735 – Back B

September 15, 2022September 15, 2022 Master Builder

8044 – Inside B

August 23, 2024August 23, 2024 Master Builder

7153 – Back A

May 10, 2022May 10, 2022 Master Builder

6267 – Back D

October 11, 2021August 1, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Episode III Large Builds Official Sets Star Wars Star Wars Sets

7257: Ultimate Lightsaber Duel

March 1, 2023March 1, 2023 Master Builder

Year Released: 2005BricklinkInstructions

Large Builds Official Sets Space UFO UFO Sets

6975: Alien Avenger

November 9, 2019July 21, 2025 Master Builder

Large Builds Official Sets Star Wars Star Wars Sets

7140: X-wing Fighter

November 10, 2019April 17, 2020 Master Builder

Official Sets Pirates Pirates I Pirates Sets Very Small Builds

6237: Pirates’ Plunder

February 8, 2022February 8, 2022 Master Builder

Dino Attack Official Sets Small Builds

7474: Urban Avenger vs. Raptor

April 27, 2023April 27, 2023 Master Builder

Castle Castle Sets Extra Large Builds Niels Milan Pedersen Official Sets Royal Knights

6090: Royal Knight’s Castle

July 13, 2021July 29, 2023 Master Builder

Classic Town Construction Medium Builds Official Sets Town Town Sets

6581: Dig N’ Dump

November 7, 2022November 7, 2022 Master Builder

ABCs Classic Space Classic Space Sets Medium Builds Official Sets Space

6892: Modular Space Transport

November 17, 2021July 31, 2023 Master Builder

Designer Sets Designer Sets Alternate Builds Designer Sets Set Medium Builds Official Sets

4883: Gear Grinders

August 2, 2021August 2, 2021 Master Builder

Adventurers Adventurers Sets Box Story Official Sets Orient Expedition Small Builds

7411: Tygurah’s Roar

December 16, 2025December 16, 2025 Master Builder

Castle Castle Sets Lion Knights Official Sets Very Small Builds

6016: Knight’s Arsenal

October 12, 2021October 12, 2021 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

1499: Twin Starfire

February 3, 2021February 3, 2021 Master Builder

Airport Classic Town Large Builds Official Sets Town Town Sets

1682: Space Shuttle

February 27, 2023July 25, 2024 Master Builder

Official Sets Space Port Town Very Small Builds

3066 (Kabaya: Town Space Port 1): Cosmos Glider

February 28, 2025February 28, 2025 Master Builder

Castle Castle Sets Knights Kingdom I Official Sets Small Builds

4818: Dragon Rider

October 8, 2024October 8, 2024 Master Builder

Building Classic Town Medium Builds Official Sets Town Town Sets

6349: Vacation House

July 1, 2021July 12, 2021 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

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 © 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.