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 7771 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

Extra Large Builds Goblet of Fire Harry Potter Harry Potter Sets Official Sets

4766: Graveyard Duel

May 16, 2023December 16, 2025 Master Builder

Year Released: 2005BricklinkInstructions

Classic Town Fire Large Builds Official Sets Town Town Sets

1656: Evacuation Team

July 22, 2026July 22, 2026 Master Builder

Bonus/Value Pack Sets Official Sets Small Builds Space Spyrius Spyrius Sets

1843-2: {Spyrius Unknown}

September 8, 2023September 13, 2023 Master Builder

Futuron Official Sets Space Supplemental

6921: Monorail Accessory Track

September 1, 2023January 22, 2026 Master Builder

Box Story Medium Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets

6270: Forbidden Island

April 4, 2022February 21, 2025 Master Builder

Large Builds Official Sets Star Wars Star Wars Sets

7140: X-wing Fighter

November 10, 2019April 21, 2026 Master Builder

Box Plus Extra Large Builds FreeStyle FreeStyle Official Sets Official Sets Poster Storage Container

2146: FreeStyle with Storage Case

December 15, 2025December 15, 2025 Master Builder

Insectoids Insectoids Sets Large Builds Official Sets

6977: Arachnoid Star Base

November 9, 2019November 9, 2019 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

Official Sets Town Town Jr Town Sets Very Small Builds Wrecker

6423: Tow-away Truck

July 10, 2026July 10, 2026 Master Builder

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

7139: Ewok Attack

June 27, 2022February 24, 2023 Master Builder

Extreme Team Official Sets Small Builds Town Town Sets

2963: Extreme Racer

January 30, 2024January 30, 2024 Master Builder

Classic Town Fire Official Sets Town Town Sets Very Small Builds

6511: Rescue Runabout

May 10, 2022May 10, 2022 Master Builder

Bonus/Value Pack Alternate Builds Castle Castle Alternate Builds Instructions Added Official Sets Royal Knights Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds

1843 – Bottom

January 22, 2021March 14, 2025 Master Builder

Official Sets Power Miners Power Miners Sets Small Builds

8956: Stone Chopper

March 27, 2026March 27, 2026 Master Builder

Classic Town Hospital Official Sets Small Builds Town Town Sets

6666: Ambulance

October 30, 2021October 30, 2021 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.