Skip to content

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
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 4973 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

6541 – Back F

February 5, 2023February 12, 2023 Master Builder

6698 – Back A

June 28, 2022June 28, 2022 Master Builder

6387 – Back C

July 15, 2022July 15, 2022 Master Builder

1818: Aircraft and Ground Support Equipment and Vehicle

April 7, 2025April 7, 2025 Master Builder

6842 – Back A

October 21, 2019October 25, 2021 Master Builder

6673 – Back B

April 20, 2025April 21, 2025 Master Builder

EXPLORE MORE OFFICIAL SETS

Official Sets Paradisa Town Town Sets Very Small Builds

6402: Sidewalk Cafe

October 5, 2019January 14, 2021 Master Builder

Year Released: 1994Bricklink

Large Builds Official Sets Technic Technic Sets

8064: Universal Motor Set 9V

February 8, 2024February 8, 2024 Master Builder

Episode IV/V/VI Large Builds Official Sets Star Wars Star Wars Sets

6206: TIE Interceptor

February 1, 2024February 1, 2024 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Traffic

6667: Pothole Patcher

November 19, 2020November 19, 2020 Master Builder

Basic Set Official Sets Samsonite Samsonite Sets

102: Super Value Set

March 1, 2023March 1, 2023 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

1580: Lunar Scout

July 12, 2021July 12, 2021 Master Builder

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

Castle Castle Sets Lion Knights Official Sets Small Builds

6049: Viking Voyager

June 30, 2022June 30, 2022 Master Builder

Official Sets Paradisa Town Town Sets Very Small Builds

1761: Paradisa Speedboat

April 10, 2023April 10, 2023 Master Builder

Adventurers Adventurers Sets Dino Island Official Sets Small Builds

5975: T-Rex Transport

December 29, 2021December 29, 2021 Master Builder

Bonus/Value Packs Futron Sets Futuron Official Sets Small Builds Space

1616: Space Combi-Pack

September 6, 2023September 6, 2023 Master Builder

Extra Large Builds Official Sets Pirates Pirates I Pirates Sets

6289: Red Beard Runner

July 13, 2021July 13, 2021 Master Builder

Alpha Team Alpha Team Sets Medium Builds Mission Deep Sea Official Sets

4793: Ogel Sub Shark

February 21, 2024February 21, 2024 Master Builder

Castle Castle Sets Lion Knights Medium Builds Official Sets

6061: Siege Tower

January 6, 2022January 6, 2022 Master Builder

Aquazone Aquazone Sets Hydronauts Official Sets Small Builds

6110: Solo Sub

February 13, 2025February 13, 2025 Master Builder

Official Sets Small Builds Space UFO UFO Sets

6818: Cyborg Scout

July 18, 2022July 18, 2022 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
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.