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

R:Tron

Concepts and Prototypes Instructions Added Medium Alt Build Medium Builds R-TRON R:Tron Space

Rtron

August 14, 2023February 12, 2025 Master Builder 7681 Views

MiscTheme: Rtron (Not Official), M:Tron Prototypes BrickJournal: Issue 6 Volume 2 – Page 41TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO

EXPLORE MORE OFFICIAL SETS

Imperial Soldiers Official Sets Pirates Pirates I Pirates Sets Small Builds

6265: Sabre Island

May 28, 2024May 28, 2024 Master Builder

Year Released: 1989BricklinkInstructions

Classic Town Extra Large Builds Gas Station Official Sets Town Town Sets Wrecker

6378: Service Station

February 25, 2023February 26, 2023 Master Builder

Castle Castle Sets Official Sets Royal Knights Very Small Builds

1752: Boat with Armor

April 10, 2023April 10, 2023 Master Builder

Classic Space Classic Space Sets Duplicate Set Number Official Sets Small Builds Space

6848: Interplanetary Shuttle

March 11, 2024March 11, 2024 Master Builder

Classic Town Harbor Medium Builds Official Sets Town Town Sets Wrecker

6698: RV with Speedboat

June 28, 2022June 28, 2022 Master Builder

Classic Town Extra Large Builds Fire Official Sets Town Town Sets

6389: Fire Control Center

January 24, 2022January 24, 2022 Master Builder

Castle Castle Sets Fright Knights Official Sets Small Builds

6037: Witch’s Windship

December 29, 2021December 29, 2021 Master Builder

Airport Classic Town Official Sets Small Builds Town Town Sets

6536: Aero Hawk

January 22, 2026January 22, 2026 Master Builder

Extra Large Builds Model Team Model Team Sets Official Sets

5581: Magic Flash

January 2, 2024January 2, 2024 Master Builder

Medium Builds Official Sets Time Cruisers Time Cruisers Sets

6496: Whirling Time Warper

March 18, 2025March 18, 2025 Master Builder

Classic Town Fire Medium Builds Official Sets Town Town Sets

6593: Blaze Battler

November 19, 2020November 19, 2020 Master Builder

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

7128: Speeder Bikes

July 14, 2021July 14, 2021 Master Builder

Adventurers Adventurers Sets Box Plus Desert Medium Builds Official Sets Storage Container

5909: Treasure Raiders set with Mummy Storage Container

October 8, 2024October 10, 2024 Master Builder

Adventurers Adventurers Sets Desert Large Builds Official Sets

5978: Sphinx Secret Surprise

October 28, 2019April 4, 2020 Master Builder

Classic Town Large Builds Official Sets Police Town Town Sets

6348: Surveillance Squad

June 23, 2026June 23, 2026 Master Builder

Insectoids Insectoids Sets Large Builds Official Sets

6919: Planetary Prowler

November 9, 2019November 9, 2019 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.