Skip to content
Back of the Box Builds

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
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Small Alt Build Small Builds 

6155 – Back A

March 20, 2023March 22, 2023 Master Builder 4902 Views

From: 6155: Deep Sea Predator
Name: Crystal Snooper 1
Instructions: View PDF | Download .io File

Contributions

  1. Name, PDF and .io file submitted on March 9, 2023 by: Valdis
  • ← 6397 – Back A
  • 6155 – Back C →

You May Also Like

6883 – Back B

October 22, 2019September 11, 2023 Master Builder

6663: Wave Rebel

June 6, 2022June 6, 2022 Master Builder

381 – Back C

July 27, 2023July 27, 2023 Master Builder

6198: Stingray Stormer

October 29, 2019April 4, 2020 Master Builder

6594 – Back D

February 5, 2023July 15, 2025 Master Builder

4940 – Back C

April 4, 2020April 4, 2020 Master Builder

EXPLORE MORE OFFICIAL SETS

6876: Alienator
ABCs Bjarne Tveskov Blacktron Blacktron Sets Official Sets Small Builds Space 

6876: Alienator

November 16, 2019October 16, 2024 Master Builder

Year Released: 1988Designer: Bjarne TveskovBricklinkInstructions *Alternate Build Connection: 6882: Walking Astro Grappler, 6878: Sub Orbital Guardian

6651: Post Office Van
Classic Town Official Sets Post Office Small Builds Town Town Sets 

6651: Post Office Van

February 3, 2021February 3, 2021 Master Builder
6783: Sonar Transmitting Cruiser
ABCs Classic Space Classic Space Sets Large Builds Official Sets Space 

6783: Sonar Transmitting Cruiser

May 8, 2022August 15, 2023 Master Builder
1787: Crater Cruiser
Medium Builds Official Sets Space Unitron Unitron Sets 

1787: Crater Cruiser

April 9, 2020July 18, 2020 Master Builder
6483: Coastal Patrol
Classic Town Large Builds Official Sets Police Town Town Sets 

6483: Coastal Patrol

December 29, 2021December 29, 2021 Master Builder
7780: The Batboat: Hunt for Killer Croc
Batman I BATMAN™ BATMAN™ Sets Medium Builds Official Sets 

7780: The Batboat: Hunt for Killer Croc

March 27, 2026March 27, 2026 Master Builder
2586: King & Throne (Chess King)
Castle Castle Sets Official Sets Very Small Builds 

2586: King & Throne (Chess King)

January 29, 2021January 29, 2021 Master Builder
4559: Cargo Railway (High Speed Train Starter Set)
9V Extra Large Builds Official Sets Town Train Train Sets 

4559: Cargo Railway (High Speed Train Starter Set)

October 26, 2026October 26, 2026 Master Builder
6894: Invader
Blacktron Blacktron Sets Medium Builds Official Sets 

6894: Invader

November 20, 2019November 20, 2019 Master Builder
775: Fire Fighter Ship
Boat Fire Medium Builds Official Sets 

775: Fire Fighter Ship

July 22, 2024July 22, 2024 Master Builder
4558: Metroliner
9V Extra Large Builds Official Sets Town Train Train Sets 

4558: Metroliner

August 11, 2026August 11, 2026 Master Builder
1974-2: Flyercracker USA
Airport Bonus/Value Pack Sets Classic Town Official Sets Small Builds Town 

1974-2: Flyercracker USA

September 7, 2023September 8, 2023 Master Builder
6381: Motor Speedway
Medium Builds Official Sets Town Town Sets 

6381: Motor Speedway

October 5, 2019February 19, 2023 Master Builder
7150: TIE Fighter & Y-wing
Large Builds Official Sets Star Wars Star Wars Sets 

7150: TIE Fighter & Y-wing

April 21, 2026April 21, 2026 Master Builder
6431: Road Rescue
Official Sets Res-Q Small Builds Town Town Sets 

6431: Road Rescue

January 20, 2022January 20, 2022 Master Builder
4706: Forbidden Corridor
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4706: Forbidden Corridor

February 27, 2023February 27, 2023 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

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
  • 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.