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

Concepts and Prototypes Space

Alien Prototype

February 23, 2023February 12, 2025 Master Builder 6429 Views

Misc
Theme: Space

BrickJournal: Issue 6 Volume 2 – Page 41
TwoMorrows Publishing
Photo Credit: Niels Milan Pedersen’s personal LEGO archives

Build: TBD
Submitted By: USER
Instructions

← Space Police II Concept
BrickJournal Issue 6 Volume 2 Page 42 – Concept 1 →

You May Also Like

Anti-Kipper Ballistic Missile

April 16, 2025April 16, 2025 Master Builder

6986 – Back E

August 13, 2023August 15, 2023 Master Builder

Book 6000 – Page 64-65

November 7, 2021February 5, 2026 Master Builder

1789 – Back A

January 16, 2024January 17, 2024 Master Builder

6950 – Back A

June 16, 2022June 28, 2022 Master Builder

6953 – Back D

May 16, 2023May 17, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Castle Castle Sets Daniel August Krentz Large Builds Lion Knights Official Sets

6067: Guarded Inn

February 9, 2021July 29, 2023 Master Builder

Year Released: 1986Designer: Daniel August KrentzBricklinkInstructions

Classic Town Fire Official Sets Small Builds Town Town Sets

6531: Flame Chaser

November 7, 2022November 7, 2022 Master Builder

Chamber of Secrets Harry Potter Harry Potter Sets Official Sets Small Builds

4735: Slytherin

February 27, 2023February 27, 2023 Master Builder

Airport Classic Town Large Builds Official Sets Town Town Sets

6346: Shuttle Launching Crew

November 20, 2020November 20, 2020 Master Builder

Classic Town Coast Guard Medium Builds Official Sets Town Town Sets

6342: Beach Rescue Chopper

July 15, 2022July 15, 2022 Master Builder

9V Official Sets Small Builds Town Train Train Sets

4525: Road and Rail Repair

July 22, 2026July 22, 2026 Master Builder

Airport Classic Town Official Sets Town Town Sets Very Small Builds

1630: Helicopter

April 8, 2025April 8, 2025 Master Builder

Black Falcons Castle Castle Sets Official Sets Small Builds

6035: Castle Guard

December 27, 2021December 27, 2021 Master Builder

Castle Castle Sets Lion Knights Official Sets Very Small Builds

6022: Horse Cart

October 19, 2019April 4, 2020 Master Builder

Extra Large Builds Model Team Model Team Sets Official Sets

5581: Magic Flash

January 2, 2024January 2, 2024 Master Builder

Castle Castle Sets Crusaders Daniel August Krentz Extra Large Builds Official Sets

6081: King’s Mountain Fortress

June 30, 2022July 29, 2023 Master Builder

ABCs Large Builds Official Sets Space UFO UFO Sets

6900: Cyber Saucer

October 2, 2024March 22, 2025 Master Builder

Bjarne Tveskov Extra Large Builds Official Sets Space Space Police I Space Police I Sets

6986: Mission Commander

April 3, 2022July 29, 2023 Master Builder

Castle Castle Sets Fright Knights Large Builds Official Sets

6087: Witch’s Magic Manor

July 8, 2022July 8, 2022 Master Builder

Airport Classic Town Medium Builds Official Sets Town Town Sets

6368: Jet Airliner

January 21, 2021January 21, 2021 Master Builder

Castle Castle Sets Duplicate Set Number Large Builds Official Sets Wolfpack

6075-1: Wolfpack Tower

October 11, 2021March 11, 2024 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.