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 5544 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

6442 – Back C

December 29, 2021December 29, 2021 Master Builder

1580 – Back C

July 12, 2021July 12, 2021 Master Builder

6748 – Back B

April 16, 2021April 16, 2021 Master Builder

6713 – Back A

February 10, 2025February 10, 2025 Master Builder

6357 – Back E

July 8, 2022July 12, 2022 Master Builder

6980 – Inside A

July 21, 2021July 21, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Alpha Team Alpha Team Sets Mission Deep Sea Official Sets Very Small Builds

Kabaya: Alpha Team 2

September 9, 2024September 9, 2024 Master Builder

Year Released: 1998?BricklinkInstructions

Classic Space Classic Space Sets Official Sets Small Builds Space

1498: Spy-Bot

March 11, 2024March 11, 2024 Master Builder

Airport Classic Town Official Sets Race Small Builds Super Model Town

Super Stunt Machine

March 8, 2025March 10, 2025 Master Builder

Bonus/Value Packs Classic Town Fire Ice Planet 2002 Ice Planet 2002 Sets Official Sets Small Builds Space Town

1722: Rescue/Ice Planet Combo Pack

July 13, 2021April 4, 2024 Master Builder

Airport Medium Builds Official Sets Town Town Sets World City

4032: Passenger Plane

December 29, 2021December 29, 2021 Master Builder

Duplicate Set Number Official Sets UFO UFO Sets Very Small Builds

6901-2: Space Plane

December 16, 2025December 16, 2025 Master Builder

Official Sets Race Town Town Sets Very Small Builds

6604: Formula-1 Racer

November 25, 2020November 25, 2020 Master Builder

Extra Large Builds Official Sets Spider-Man Spider-Man 2 Spider-Man Sets

4856: Doc Ock’s Hideout

December 16, 2025December 16, 2025 Master Builder

Box Story Fabuland Fabuland Sets Medium Builds Official Sets

132: Cottage

March 1, 2023April 3, 2024 Master Builder

Classic Town Official Sets Police Town Town Sets Very Small Builds

6623: Police Car

October 13, 2021October 13, 2021 Master Builder

Batman I BATMAN™ BATMAN™ Sets Medium Builds Official Sets

7780: The Batboat: Hunt for Killer Croc

March 27, 2026March 27, 2026 Master Builder

Castle Castle Sets Dark Forest Official Sets Small Builds

6024: Bandit Ambush

April 16, 2021April 16, 2021 Master Builder

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

7106: Droid Escape

March 1, 2023March 1, 2023 Master Builder

Harry Potter Harry Potter Sets Official Sets Small Builds Sorcerer's Stone

4702: The Final Challenge

August 8, 2024August 8, 2024 Master Builder

Episode I Extra Large Builds Official Sets Star Wars Star Wars Sets Star Wars Technic Technic

8002: Destroyer Droid

August 17, 2023September 1, 2023 Master Builder

Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets

4733: The Dueling Club

March 3, 2023March 3, 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
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.