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 4499 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

6552 – Back F

May 11, 2024May 13, 2024 Master Builder

6073 – Back B

October 23, 2019August 1, 2023 Master Builder

6087 – Back A

April 19, 2023April 26, 2023 Master Builder

6235 – Back A

May 23, 2022May 23, 2022 Master Builder

6454 – Back A

September 2, 2024September 5, 2024 Master Builder

6190 – Back A

September 14, 2023September 18, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Classic Space Classic Space Sets Medium Builds Official Sets

6891: Gamma-V Laser Craft

September 13, 2019August 3, 2024 Master Builder

Year Released: 1985Bricklink

Classic Town Official Sets Police Town Town Sets Very Small Builds

6623: Police Car

October 13, 2021October 13, 2021 Master Builder

Official Sets Pirates Pirates I Pirates Sets Very Small Builds

1747: Treasure Cave

May 6, 2022May 6, 2022 Master Builder

ABCs Jørn Thomsen Medium Builds Official Sets Spyrius Spyrius Sets

6939: Saucer Centurion

November 9, 2019October 1, 2024 Master Builder

ABCs Official Sets Race Town Town Sets Very Small Builds

6677: Motocross Racing

June 8, 2023July 31, 2023 Master Builder

Official Sets Pirates Pirates I Pirates Sets Very Small Builds

6235: Buried Treasure

May 23, 2022May 23, 2022 Master Builder

Aquazone Aquazone Sets Large Builds Official Sets Stingrays

6160: Sea Scorpion

October 29, 2019April 4, 2020 Master Builder

Extra Large Builds Official Sets Technic Technic Sets

8860: Car Chassis (Auto Chassis)

January 2, 2024January 2, 2024 Master Builder

Bonus/Value Pack Sets Bonus/Value Packs Exploriens Exploriens Sets Official Sets Small Builds Space

Space 3-Pack: Exploriens

October 2, 2024October 3, 2024 Master Builder

Airport Classic Town Medium Builds Official Sets Town Town Sets

3439: Spy Runner

May 11, 2022May 11, 2022 Master Builder

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

7180: B-wing at Rebel Control Center

August 17, 2023August 17, 2023 Master Builder

Jørn Thomsen Official Sets Space Space Police II Space Police II Sets Very Small Builds

1916 (Kabaya: Space 3): Starion Patrol

January 19, 2022February 25, 2025 Master Builder

Batman I BATMAN™ BATMAN™ Sets Official Sets Small Builds

7779: The Batman Dragster: Catwoman Pursuit

March 27, 2026March 27, 2026 Master Builder

Jørn Thomsen Large Builds Official Sets Spyrius Spyrius Sets

6959: Lunar Launch Site

April 27, 2020July 29, 2023 Master Builder

Castle Castle Sets Official Sets Royal Knights Very Small Builds

1752: Boat with Armor

April 10, 2023April 10, 2023 Master Builder

Bonus/Value Pack Sets Castle Castle Sets Forestmen Official Sets Small Builds

1877: Crusader’s Cart

October 11, 2021September 24, 2024 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.