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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
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    • Technic
    • Town
    • Universal Building Set
    • Western
    • More Sets
    • Misc
  • USEFUL LINKS
    • Submit Instructions!
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    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Concepts and Prototypes

Blacktron Blacktron Alternate Builds Captain Indigo Concepts and Prototypes Instructions Added LEGO Builders Club LEGO Magazine Space Very Small Alt Build Very Small Builds 

T42

March 9, 2025March 22, 2025 Master Builder 5121 Views

MiscBuild: T42 Instructions: View PDF | Download .io File Also Pictured: Blacktron Time Machine Bricks n Pieces: Spring 1988 – Page 4UK LEGO

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Blacktron Blacktron Alternate Builds Captain Indigo Concepts and Prototypes Instructions Added LEGO Builders Club LEGO Magazine Small Alt Build Small Builds Space 

Blacktron Time Machine

March 1, 2025March 22, 2025 Master Builder 5026 Views

MiscBuild: Blacktron Time Machine Instructions: View PDF | Download .io File Also pictured: T42 Bricks n Pieces: Spring 1988 – Page 4UK LEGO

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ABCs Concepts and Prototypes Sea People Sea-Tron Space 

Sea People

February 12, 2025February 12, 2025 Master Builder 4079 Views

MiscTheme: Seatron, Aquadome *Alternate Build Connection: Aquazone BrickJournal: Issue 6 Volume 2 – Page 43TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal

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ABCs Concepts and Prototypes Sea People Sea-Tron Space 

Aquadome

February 11, 2025February 18, 2025 Master Builder 4294 Views

MiscTheme: Seatron, Sea People *Alternate Build Connection: Aquazone, 6195: Neptune Discovery Lab (Aqua Dome 7), 6199: Hydro Crystalization Station LEGO®

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Concepts and Prototypes Grey:tron Grøntrøn Space 

Greytron

February 11, 2025February 11, 2025 Master Builder 4233 Views

MiscTheme: Greytron (Not Official) BrickJournal: Issue 6 Volume 2 – Page 42TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives LEGO®

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Concepts and Prototypes LEGO Builders Club LEGO Magazine You Can Build This 

Swinging On A Star

February 6, 2025March 22, 2025 Master Builder 4892 Views

MiscBuild: Would You Like to Swing on a StarSubmitted By: USERInstructions: Also pictured: Islander Mask Brick Kicks: Fall 1994 –

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ABCs Adventurers Adventurers Alternate Builds Concepts and Prototypes Desert You Can Build This 

Desert Buggy

February 6, 2025March 22, 2025 Master Builder 4786 Views

MiscBuild: Desert BuggySubmitted By: USERInstructions: *Alternate Build Connection: 5918: Scorpion Detector LEGO Mania Magazine: May-June 1998 – Page 7US LEGO

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ABCs Concepts and Prototypes Futuron Futuron Alternate Builds LEGO Builders Club LEGO Magazine Space You Can Build This 

Space Sunglasses

February 6, 2025March 22, 2025 Master Builder 4806 Views

MiscBuild: Space SunglassesSubmitted By: USERInstructions: *Alternate Build Connection: 6990: Futuron Monorail Transport System Brick Kicks: Fall 1989 – Page 7US LEGO

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Concepts and Prototypes LEGO Builders Club LEGO Magazine 

Marble Run

February 5, 2025March 22, 2025 Master Builder 4830 Views

MiscBuild: Marble RunSubmitted By: USERInstructions: Bricks n Pieces: Autumn 1987 – Page 10UK LEGO Club Magazine 

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ABCs Concepts and Prototypes Islanders LEGO Builders Club LEGO Magazine Pirates You Can Build This 

Islander Mask

January 26, 2025March 22, 2025 Master Builder 4930 Views

MiscBuild: Islander MaskSubmitted By: USERInstructions: *Alternate Build Connection: Islanders Also pictured: Swinging On A Star Brick Kicks: Fall 1994 –

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ABCs Aquazone Concepts and Prototypes You Can Build This 

Aqua Rover

January 18, 2025March 22, 2025 Master Builder 4888 Views

MiscBuild: Aqua Rover (Inspired by Aqua Cat)Submitted By: USERInstructions: *Alternate Build Connection: 6150: Crystal Detector LEGO Mania Magazine: May-June 1998 –

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Concepts and Prototypes M:Tron M:Tron Alternate Builds Space 

M:Tron Prototypes

January 23, 2024February 12, 2025 Master Builder 4957 Views

MiscTheme: M:Tron, Rtron (Not Official) BrickJournal: Issue 6 Volume 2 – Page 40TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives BrickJournal:

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Classic Space Classic Space Alternate Builds Concepts and Prototypes Space 

Classic Space Moon Base Concept

January 1, 2024February 12, 2025 Master Builder 4218 Views

MiscTheme: Classic Space LEGO® Space: 1978-1992 – Page 156Published: 2023By: Tim JohnsonDark Horse Books Build: TBDSubmitted By: USERInstructions

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Classic Space Classic Space Alternate Builds Concepts and Prototypes Space 

Robot Prototypes

January 1, 2024February 11, 2025 Master Builder 4146 Views

MiscTheme: Classic Space LEGO® Space: 1978-1992 – Page 156Published: 2023By: Tim JohnsonDark Horse Books Build 1: Build: 2: Build 3:

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Classic Space Classic Space Alternate Builds Concepts and Prototypes Space 

Space Technic Concept

January 1, 2024February 11, 2025 Master Builder 4423 Views

MiscTheme: Space Technic LEGO® Space: 1978-1992 – Page 156Published: 2023By: Tim JohnsonDark Horse Books Build: TBDSubmitted By: USERInstructions

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Concepts and Prototypes 

LEGO® Space: 1978-1992

January 1, 2024January 23, 2024 Master Builder 4446 Views

MiscPublished: 2023By: Tim JohnsonDark Horse Books

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

Rtron

August 14, 2023February 12, 2025 Master Builder 4769 Views

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

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Concepts and Prototypes Instructions Added M:Tron M:Tron Alternate Builds Small Alt Build Small Builds Space 

BrickJournal Issue 6 Volume 2 Page 40 – Proto 2

June 24, 2023August 15, 2023 Master Builder 3989 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Name: M-Tron Transforming Vehicle Instructions: View PDF

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Concepts and Prototypes Instructions Added M:Tron M:Tron Alternate Builds Small Alt Build Small Builds Space 

BrickJournal Issue 6 Volume 2 Page 40 – Proto 1

June 24, 2023August 15, 2023 Master Builder 3933 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Name: M-Tron Walker Instructions: View PDF

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Concepts and Prototypes Instructions Added M:Tron M:Tron Alternate Builds Small Alt Build Small Builds Space 

BrickJournal Issue 6 Volume 2 Page 40 – Proto 5

June 22, 2023August 15, 2023 Master Builder 3593 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Name: M-Tron Powersuit #2 Instructions: View PDF

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Concepts and Prototypes Instructions Added M:Tron M:Tron Alternate Builds Small Alt Build Small Builds Space 

BrickJournal Issue 12 Page 77 – Proto 1

June 22, 2023August 15, 2023 Master Builder 3816 Views

BrickJournal Issue 12TwoMorrows PublishingPhoto credit the LEGO® Group and Mark Stafford Name: M-Tron Forklift Mecha Instructions: View PDF

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ABCs Concepts and Prototypes Instructions Added M:Tron M:Tron Alternate Builds Small Alt Build Small Builds Space 

BrickJournal Issue 6 Volume 2 Page 40 – Proto 4

June 21, 2023August 15, 2023 Master Builder 3872 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Name: M-Tron Powersuit Instructions: View PDF *Alternate Build Connection: 7703

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ABCs Concepts and Prototypes Instructions Added M:Tron M:Tron Alternate Builds Small Alt Build Small Builds Space 

BrickJournal Issue 6 Volume 2 Page 40 – Proto 3

June 21, 2023August 15, 2023 Master Builder 3752 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Name: M-Tron Crane Instructions: View PDF *Alternate Build Connection: 6352:

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ABCs Classic Space Classic Space Alternate Builds Concepts and Prototypes Instructions Added Large Alt Build Space 

Classic Space Remote Controlled Vehicle

May 26, 2023February 12, 2025 Master Builder 4143 Views

MiscTheme: Classic Space BrickJournal: Issue 6 Volume 2 – Page 39TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Name: Classic

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ABCs Concepts and Prototypes Sea People Sea-Tron Space 

Seatron

February 23, 2023February 12, 2025 Master Builder 4191 Views

MiscTheme: Seatron, Sea People, Aquadome *Alternate Build Connection: Aquazone BrickJournal: Issue 6 Volume 2 – Page 43TwoMorrows PublishingPhoto Credit: Niels

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Concepts and Prototypes Sea People Sea-Tron Space 

BrickJournal Issue 6 Volume 2 Page 43 – Proto 1

February 23, 2023August 15, 2023 Master Builder 3689 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives

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Concepts and Prototypes Sea People Sea-Tron Space 

BrickJournal Issue 6 Volume 2 Page 43 – Concept 1

February 23, 2023August 15, 2023 Master Builder 3602 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives

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Concepts and Prototypes Space 

Blacktron II Prototypes

February 23, 2023February 11, 2025 Master Builder 3868 Views

MiscTheme: Blacktron II BrickJournal Issue 6 Volume 2 – Page 42TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Build 1:

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Concepts and Prototypes Grey:tron Grøntrøn Space 

BrickJournal Issue 6 Volume 2 Page 42 – Concept 1

February 23, 2023August 15, 2023 Master Builder 3658 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives

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Concepts and Prototypes Space 

Alien Prototype

February 23, 2023February 12, 2025 Master Builder 3865 Views

MiscTheme: Space BrickJournal: Issue 6 Volume 2 – Page 41TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Build: TBDSubmitted By:

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Concepts and Prototypes Space Space Police I Space Police I Alternate Builds Space Police II Space Police II Alternate Builds 

Space Police II Concept

February 23, 2023February 11, 2025 Master Builder 4121 Views

MiscTheme: Space Police II BrickJournal: Issue 6 Volume 2 – Page 39TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Build

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ABCs Blacktron Blacktron Alternate Builds Blacktron II Blacktron II Alternate Builds Concepts and Prototypes Space 

Blacktron Concept

February 23, 2023February 11, 2025 Master Builder 4360 Views

MiscTheme: Blacktron BrickJournal: Issue 6 Volume 2 – Page 39TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives Build 1: TBDSubmitted

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Concepts and Prototypes 

BrickJournal Issue 6 Volume 2

February 23, 2023August 15, 2023 Master Builder 4564 Views

MiscPublished: Summer 2009TwoMorrows Publishing

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Concepts and Prototypes 

BrickJournal Issue 12

February 23, 2023August 15, 2023 Master Builder 3600 Views

MiscPublished: October 2010TwoMorrows Publishing

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EXPLORE MORE OFFICIAL SETS

565: Build-N-Store Chest
Basic Large Builds Official Sets Universal Building Set 

565: Build-N-Store Chest

December 28, 2023July 11, 2024 Master Builder

Year Released: 1990BricklinkInstructions

7255: General Grievous Chase
Episode III Official Sets Small Builds Star Wars Star Wars Sets 

7255: General Grievous Chase

March 2, 2023March 2, 2023 Master Builder
6036: Skeleton Surprise
Castle Castle Sets Official Sets Royal Knights Small Builds 

6036: Skeleton Surprise

February 28, 2023February 28, 2023 Master Builder
6814: Ice Tunnelator
Ice Planet 2002 Ice Planet 2002 Sets Jørn Thomsen Official Sets Space Very Small Builds 

6814: Ice Tunnelator

April 6, 2020April 2, 2025 Master Builder
857: Motorcycle
Extra Large Builds Official Sets Technic Technic Sets 

857: Motorcycle

January 6, 2025January 6, 2025 Master Builder
1665: Duel FX Racers
Official Sets Small Builds Town Town Sets 

1665: Duel FX Racers

April 30, 2024April 30, 2024 Master Builder
6251: Pirate Mini Figures (Sea Mates)
Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

6251: Pirate Mini Figures (Sea Mates)

April 9, 2020April 9, 2020 Master Builder
6344: Jet Speed Justice
Classic Town Medium Builds Official Sets Police Town Town Sets 

6344: Jet Speed Justice

October 8, 2024October 8, 2024 Master Builder
381: Police Headquarters
Classic Town Large Builds Official Sets Police Town Town Sets 

381: Police Headquarters

July 27, 2023July 27, 2023 Master Builder
2162: Hydro Reef Wrecker
Aquaraiders I Aquazone Aquazone Sets Large Builds Official Sets 

2162: Hydro Reef Wrecker

July 18, 2022July 18, 2022 Master Builder
6099: Traitor Transport {with Dragon Cave}
Box Plus Castle Castle Sets Fright Knights Medium Builds Official Sets Playscape/Play Stage Box 

6099: Traitor Transport {with Dragon Cave}

April 1, 2025April 1, 2025 Master Builder
6380: Emergency Treatment Center (St. Mary’s Hospital)
Classic Town Hospital Large Builds Official Sets Town Town Sets 

6380: Emergency Treatment Center (St. Mary’s Hospital)

July 15, 2022July 15, 2022 Master Builder
6396: International Jetport
Airport Classic Town Extra Large Builds Official Sets Town Town Sets 

6396: International Jetport

July 14, 2021July 14, 2021 Master Builder
6817: Beta Buzzer
ABCs Insectoids Insectoids Sets Official Sets Space Very Small Builds 

6817: Beta Buzzer

June 1, 2022March 22, 2025 Master Builder
3066 (Kabaya: Town Space Port 1): Cosmos Glider
Official Sets Space Port Town Very Small Builds 

3066 (Kabaya: Town Space Port 1): Cosmos Glider

February 28, 2025February 28, 2025 Master Builder
1896: Trauma Team
Classic Town Hospital Large Builds Official Sets Town Town Sets 

1896: Trauma Team

April 4, 2022April 4, 2022 Master Builder

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About This Site

Logo
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.

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