Skip to content

Back of the Box Builds

LEGO Alternate Builds!

SETS
- Adventurers
- Aquazone
- 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
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 6137 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

Classic Town Official Sets Small Builds Town Town Sets Traffic

6590: Vacation Camper

July 8, 2022July 8, 2022 Master Builder

Year Released: 1988BricklinkInstructions

Classic Space Classic Space Sets Official Sets Small Builds Space

6822: Space Digger

March 12, 2024March 12, 2024 Master Builder

Medium Builds Official Sets Western Western Sets

6764: Sheriff’s Lock-Up

September 1, 2024September 1, 2024 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

Airport Classic Town Official Sets Town Town Sets Very Small Builds

1630: Helicopter

April 8, 2025April 8, 2025 Master Builder

Creator Expert Extra Large Builds Modular Buildings Collection Official Sets

10182: Café Corner

January 23, 2024January 23, 2024 Master Builder

ABCs Castle Castle Sets Classic Castle Daniel August Krentz Different Set Numbers Duplicate Set Number Extra Large Builds Official Sets

375-2 (6075-2): Castle

November 8, 2019September 5, 2025 Master Builder

Divers Medium Builds Official Sets Town Town Sets

6558: Shark Cage Cove

December 29, 2021December 29, 2021 Master Builder

Basic Large Builds Official Sets Universal Building Set

535: Basic Building Set Tote Pack

May 15, 2023May 16, 2023 Master Builder

Airport Classic Town Large Builds Official Sets Town Town Sets

6345: Aerial Acrobats

January 29, 2021September 15, 2022 Master Builder

Large Builds Official Sets Technic Technic Sets

8064: Universal Motor Set 9V

February 8, 2024February 8, 2024 Master Builder

Large Builds Official Sets Space UFO UFO Sets

6975: Alien Avenger

November 9, 2019July 21, 2025 Master Builder

Extra Large Builds Official Sets Pirates Pirates I Pirates Sets

6289: Red Beard Runner

July 13, 2021July 13, 2021 Master Builder

ABCs Box Story Jørn Thomsen Large Builds Official Sets Space Space Police II Space Police II Sets

6957: Solar Snooper

March 18, 2022February 18, 2025 Master Builder

Classic Town Official Sets Supplemental Town

6310: T-Road Plates

October 10, 2022May 5, 2025 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
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.