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LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
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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 5177 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 5084 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 4146 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 4364 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 4326 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 4938 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 4821 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 4847 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 4865 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 4994 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 4932 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 5121 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 4277 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 4190 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 4473 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 4860 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 4207 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 4293 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 3731 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 3933 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 3917 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 4195 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 4428 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

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

Year Released: 198910 PiecesBricklink

5986: Amazon Ancient Ruins
Adventurers Adventurers Sets Box Story Extra Large Builds Jungle Official Sets 

5986: Amazon Ancient Ruins

October 29, 2019April 3, 2024 Master Builder
6211: Imperial Star Destroyer
Episode IV/V/VI Extra Large Builds Official Sets Star Wars Star Wars Sets 

6211: Imperial Star Destroyer

February 6, 2024February 7, 2024 Master Builder
7711: Sentry
Exo-Force Official Sets Small Builds 

7711: Sentry

August 11, 2023August 11, 2023 Master Builder
6861: Blacktron Super Model
Blacktron II Blacktron II Alternate Builds Blacktron II Sets Jørn Thomsen Large Builds Official Sets Space Super Model 

6861: Blacktron Super Model

July 29, 2023July 29, 2023 Master Builder
600: Police Patrol
Classic Town Official Sets Police Town Town Sets Very Small Builds 

600: Police Patrol

July 11, 2024July 11, 2024 Master Builder
6160: Sea Scorpion
Aquazone Aquazone Sets Large Builds Official Sets Stingrays 

6160: Sea Scorpion

October 29, 2019April 4, 2020 Master Builder
4920: Rapid Rider
Official Sets Rock Raiders Rock Raiders Sets Very Small Builds 

4920: Rapid Rider

March 1, 2023March 1, 2023 Master Builder
6883: Terrestrial Rover
Classic Space Classic Space Sets Official Sets Small Builds Space 

6883: Terrestrial Rover

October 22, 2019October 21, 2024 Master Builder
6354: Pursuit Squad
Classic Town Medium Builds Official Sets Police Town Town Sets 

6354: Pursuit Squad

February 9, 2022February 9, 2022 Master Builder
1853: Navigator
Box Plus Different Box Versions Medium Builds Official Sets Playscape/Play Stage Box Time Cruisers Time Cruisers Sets 

1853: Navigator

March 18, 2025March 20, 2025 Master Builder
1476: 5 Set Bonus Pack
Bonus/Value Pack Sets Bonus/Value Packs Official Sets Small Builds 

1476: 5 Set Bonus Pack

July 22, 2024October 2, 2024 Master Builder
6615: Eagle Stunt Flyer
Airport Classic Town Official Sets Small Builds Town Town Sets 

6615: Eagle Stunt Flyer

January 5, 2022January 5, 2022 Master Builder
1912: Car (Set A, 1)
Basic Happy Meal McDonalds Official Sets Polybag Universal Building Set Very Small Builds 

1912: Car (Set A, 1)

April 1, 2025April 1, 2025 Master Builder
7143: Jedi Starfighter
Episode II Medium Builds Official Sets Star Wars Star Wars Sets 

7143: Jedi Starfighter

December 29, 2021December 29, 2021 Master Builder
6263: Imperial Outpost
Imperial Guards Medium Builds Official Sets Pirates Pirates I Pirates Sets 

6263: Imperial Outpost

February 21, 2025February 21, 2025 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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