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
- 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 4925 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

6469 – Back B

March 3, 2025March 3, 2025 Master Builder

6925 – Back B

September 25, 2019September 28, 2019 Master Builder

6630 – Back A

October 13, 2021October 13, 2021 Master Builder

6206 – Back A

October 19, 2024February 4, 2025 Master Builder

6856 – Back A

November 9, 2022November 14, 2022 Master Builder

928 – Back H

November 25, 2020October 13, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Official Sets Race Town Town Sets Very Small Builds

6503: Sprint Racer

July 9, 2022July 9, 2022 Master Builder

Year Released: 1988BricklinkInstructions

Batman I BATMAN™ BATMAN™ Sets Extra Large Builds Official Sets

7785: Arkham Asylum

March 30, 2026March 30, 2026 Master Builder

Insectoids Insectoids Sets Official Sets Space Very Small Builds

6903: Bug Blaster

October 4, 2024October 4, 2024 Master Builder

Airport Bonus/Value Pack Sets Classic Town Official Sets Small Builds Town

1974-2: Flyercracker USA

September 7, 2023September 8, 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

Box Story Cowboys Jørn Thomsen Large Builds Official Sets Western Western Sets

6761: Bandit’s Secret Hide-Out

December 29, 2021April 3, 2024 Master Builder

Ice Planet 2002 Ice Planet 2002 Sets Official Sets Small Builds Space

6879: Blizzard Baron

November 20, 2019July 29, 2023 Master Builder

Airport Classic Town Medium Builds Official Sets Town Town Sets

6368: Jet Airliner

January 21, 2021January 21, 2021 Master Builder

Adventurers Adventurers Sets Desert Official Sets Small Builds

5928: Bi-Wing Baron

February 22, 2023February 22, 2023 Master Builder

Jurassic Park III Medium Builds Official Sets Studio Alternate Builds Studio Sets Studios

1371: Spinosaurus Attack Studio

January 6, 2022June 4, 2024 Master Builder

Building Classic Town Medium Builds Official Sets Town Town Sets

6360: Weekend Cottage

October 19, 2019April 4, 2020 Master Builder

Classic Town Large Builds Official Sets Police Town Town Sets

6483: Coastal Patrol

December 29, 2021December 29, 2021 Master Builder

Medium Builds Official Sets Pirates Pirates I Pirates Sets

6296: Shipwreck Island

January 12, 2022January 12, 2022 Master Builder

Futron Sets Futuron Medium Builds Official Sets

6893: Orion II Hyperspace

September 25, 2019September 28, 2019 Master Builder

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

4502: X-wing Fighter (Dagobah)

May 15, 2023May 15, 2023 Master Builder

Cowboys Jørn Thomsen Official Sets Small Builds Western Western Sets

6716: Weapons Wagon

April 2, 2022July 29, 2023 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
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.