Extra Large Alt Build Archives - Back of the Box Builds

5580 – Back A

February 9, 2026March 4, 2026 Master Builder 4240 Views

From: 5580: Highway RigName: TBD Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Model Team Model Team Alternate Builds

5550 – Back A

February 9, 2026March 4, 2026 Master Builder 4212 Views

From: 5550: Custom Rally VanName: TBD Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Model Team Model Team Alternate Builds

5581 – Back A

January 31, 2026March 4, 2026 Master Builder 4257 Views

From: 5581: Magic FlashName: TBD Instructions: View PDF | Download .io File

Castle Castle Alternate Builds Extra Large Alt Build Idea Book Instructions Added

Book 250 – Page 48-49

September 30, 2025October 16, 2025 Master Builder 6152 Views

From: Idea Book 250Year Released: 1987 Full Page Build: Castle Siege Instructions: View PDF | Download .io File Build 1: Lion Knight’s Siege –

Castle Castle Alternate Builds Extra Large Alt Build Idea Book Instructions Added

Book 250 – Page 44-45

September 30, 2025October 16, 2025 Master Builder 8049 Views

From: Idea Book 250Year Released: 1987 Full Page Build:Castle Construction Site Instructions: View PDF | Download .io File Build 1: Sawmill Instructions: View PDF

Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Idea Book Instructions Added

Book 260 – Page 34-35

July 21, 2025August 2, 2025 Master Builder 7587 Views

From: Idea Book 260Year Released: 1990 Build 1: The Village – Farmhouse Instructions: View PDF Build 2: The Village – Procession

Alternate Instructions Included Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Idea Book Instructions Added Large Alt Build Large Builds Medium Alt Build Medium Builds

Book 260 – Page 32-33

July 21, 2025August 2, 2025 Master Builder 7638 Views

From: Idea Book 260Year Released: 1990 Page Build: War of the Two Houses Instructions: View PDF Build 8: Black Knight Fortress

Alternate Instructions Included Castle Castle Alternate Builds Extra Large Alt Build Idea Book Instructions Added Large Alt Build Medium Alt Build

Book 260 – Page 30-31

July 21, 2025August 2, 2025 Master Builder 5155 Views

From: Idea Book 260Year Released: 1990 Build 1: Tree Instructions: View PDF | Download .io File Build 2: Tree Lookout Instructions: View PDF

Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Idea Book Instructions Added

Book 260 – Page 28-29

July 21, 2025August 2, 2025 Master Builder 10389 Views

From: Idea Book 260Year Released: 1990 Build 1: Main Keep Instructions: View PDF Build 2: Barracks Instructions: View PDF Build 3: Waterfront Instructions: View

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6393 – Back E

July 4, 2025July 15, 2025 Master Builder 3554 Views

From: 6393: Big-Rig Truck StopName: Brick Street Construction Instructions: View PDF

Classic Town Extra Large Alt Build Extra Large Builds Idea Book Instructions Added Town Town Alternate Builds

Book 226 – Page 36-37

February 13, 2025February 20, 2025 Master Builder 4120 Views

From: Idea Book 226Year Released: 1981 Build 1: Wind Mill Instructions: View PDF | Download .io File Build 2: Large Factory Instructions: View PDF | Download .io

Castle Castle Alternate Builds Classic Space Classic Space Alternate Builds Classic Town Extra Large Alt Build Idea Book Instructions Added Large Alt Build Medium Alt Build Space Town

Book 200 – Page 50-51

May 1, 2024September 12, 2024 Master Builder 5676 Views

From: Idea Book 200Year Released: 1985 Build: Surface Explorer Instructions: View PDF | Download .io File Build: DJ Station Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Imperial Soldiers Instructions Added Pirates Pirates Alternate Builds Pirates I

6276 – Back D

December 22, 2023January 1, 2024 Master Builder 3930 Views

From: 6276: Eldorado FortressName: Aggressive Negotiations Instructions: View PDF | Download .io File

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Harbor Instructions Added Town Town Alternate Builds

6542 – Back G

December 22, 2023January 1, 2024 Master Builder 4563 Views

From: 6542: Launch & Load SeaportName: Seaport Dry Dock Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added M:Tron M:Tron Alternate Builds

6989 – Back C

November 29, 2023April 4, 2024 Master Builder 4408 Views

From: 6989: Mega Core MagnetizerName: M:Tron Superbike Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Imperial Soldiers Instructions Added Pirates Pirates Alternate Builds Pirates I

6276 – Back C

November 21, 2023November 29, 2023 Master Builder 5649 Views

From: 6276: Eldorado FortressName: Eldorado Prison Break Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Imperial Soldiers Instructions Added Pirates Pirates Alternate Builds Pirates I

6276 – Back B

October 5, 2023October 10, 2023 Master Builder 4831 Views

From: 6276: Eldorado FortressName: Eldorado Siege Instructions: View PDF | Download .io File

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Harbor Instructions Added Town Town Alternate Builds

6542 – Back A

October 5, 2023October 10, 2023 Master Builder 5122 Views

From: 6542: Launch & Load SeaportName: Sea Monster Processing Hub Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Imperial Soldiers Instructions Added Pirates Pirates Alternate Builds Pirates I

6276 – Back A

September 14, 2023September 18, 2023 Master Builder 4648 Views

From: 6276: Eldorado FortressName: Eldorado Customs Checkpoint Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added M:Tron M:Tron Alternate Builds

6989 – Back D

September 14, 2023April 4, 2024 Master Builder 4468 Views

From: 6989: Mega Core MagnetizerName: Mega Core Transport Vehicle Instructions: View PDF | Download .io File

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space Space Police I Space Police I Alternate Builds

6986 – Back E

August 13, 2023August 15, 2023 Master Builder 4347 Views

From: 6986: Mission Commander Mission Squadron(From left to right) Name: Galactic Interceptor Instructions: View PDF Name: Auxiliary Perpetrator Instructions: View PDF Name: Aerial Scout Instructions: View PDF

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space Space Police I Space Police I Alternate Builds

6986 – Back B

July 6, 2023July 11, 2023 Master Builder 4499 Views

From: 6986: Mission CommanderName: Moth Commander Instructions: View PDF

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space Space Police I Space Police I Alternate Builds

6986 – Back A

June 3, 2023June 4, 2023 Master Builder 5577 Views

From: 6986: Mission CommanderName (Model Prison): Space Lock-Up Isolation Outpost Instructions: View PDF Name (Model Spaceship): Mission Striker Instructions: View

Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space Space Police I Space Police I Alternate Builds

6986 – Back D

April 21, 2023May 31, 2023 Master Builder 4518 Views

From: 6986: Mission CommanderName: Mission Overlord Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Inside A

February 10, 2023February 18, 2023 Master Builder 4155 Views

From: 6390: Main StreetName: Main Street Repair Shop Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Back G

February 10, 2023February 10, 2023 Master Builder 3665 Views

From: 6390: Main StreetName: Main Street Food Truck Square Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Back F

February 10, 2023February 10, 2023 Master Builder 3814 Views

From: 6390: Main StreetName: Main Street Shipping Depot Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Back E

February 10, 2023February 10, 2023 Master Builder 3713 Views

From: 6390: Main StreetName: Main Street Condos Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Back C

February 10, 2023February 10, 2023 Master Builder 3904 Views

From: 6390: Main StreetName: Main Street Diner Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Back B

February 10, 2023February 10, 2023 Master Builder 3357 Views

From: 6390: Main StreetName: Main Street Store Instructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Instructions Added Town Town Alternate Builds Traffic

6390 – Back A

February 10, 2023February 10, 2023 Master Builder 3706 Views

From: 6390: Main StreetName: Legoland Hotel Instructions: View PDF

ABCs Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added M:Tron M:Tron Alternate Builds

6989 – Back A

January 9, 2023June 23, 2025 Master Builder 6143 Views

From: 6989: Mega Core MagnetizerName: Mega Core Mining Unit Instructions: View PDF | Download .io File *Alternate Build Connection: 1980 Medium US Assortment

Alternate Builds Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6080 – Inside A

December 16, 2022December 20, 2022 Master Builder 6210 Views

From: 6080: King’s CastleName:Instructions: View PDF

Alternate Builds Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

375-2 – Inside B

December 16, 2022September 5, 2025 Master Builder 4918 Views

From: 375-2 (6075-2): CastleName: TBDInstructions: View PDF

Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Harbor Instructions Added Town Town Alternate Builds

6541 – Back A

November 9, 2022November 14, 2022 Master Builder 3796 Views

From: 6541: Intercoastal SeaportName: Deep Sea Cargo Hub Instructions: View PDF | Download .io File

Alternate Builds Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6080 – Back A

October 2, 2022December 20, 2022 Master Builder 11115 Views

From: 6080: King’s CastleName: Instructions: View PDF

Classic Town Extra Large Alt Build Idea Book Instructions Added Town

Book 6000 – Page 44-45

September 5, 2022September 20, 2022 Master Builder 4891 Views

From: Idea Book 6000Year Released: 1980 Build 1: Follow CarInstructions: Included on Page Build 2: Hanger Instructions: View PDF | Download .io File

ABCs Alternate Builds Blacktron Blacktron Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6987 – Back B

March 29, 2022March 2, 2026 Master Builder 8445 Views

From: 6987: Message Intercept BaseName: Message Transporting Vessel Instructions: View PDF | Download .io File *Alternate Build Connection: 928 – Back A, 6932:

Alternate Builds Blacktron Blacktron Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6987 – Back D

February 24, 2022March 2, 2026 Master Builder 5390 Views

From: 6987: Message Intercept BaseName: Message Debugging Unit Instructions: View PDF | Download .io File

Alternate Builds Blacktron Blacktron Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6987 – Back A

January 31, 2022March 2, 2026 Master Builder 5489 Views

From: 6987: Message Intercept BaseName: Message Processing Hub Instructions: View PDF | Download .io File

Extra Large Alt Build Extra Large Builds Idea Book Instructions Added Pirates Pirates Alternate Builds

Book 260 – Page 36-37

November 1, 2021August 1, 2023 Master Builder 7504 Views

From: Idea Book 260Year Released: 1990 Build 1: Bluecoat Fortress Assault – Fortress Instructions: View PDF Build 2: Bluecoat Fortress Assault –

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6086 – Back B

October 11, 2021October 28, 2021 Master Builder 6494 Views

From: 6086: Black Knight’s CastleName: Black Knight’s Lookout Fortification Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6086 – Back A

October 11, 2021October 28, 2021 Master Builder 5983 Views

From: 6086: Black Knight’s CastleName: Black Monarch’s Summer Retreat Keep Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6086 – Inside B

October 11, 2021October 28, 2021 Master Builder 6603 Views

From: 6086: Black Knight’s CastleName: Black Knight’s Village Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6086 – Inside A

October 11, 2021October 28, 2021 Master Builder 7111 Views

From: 6086: Black Knight’s CastleName: Black Knight’s Stronghold Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6085 – Inside B

July 13, 2021October 28, 2021 Master Builder 4739 Views

From: 6085: Black Monarch’s CastleName: Black Knight’s Siege Beast Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6085 – Inside A

July 13, 2021January 28, 2022 Master Builder 6165 Views

From: 6085: Black Monarch’s CastleName: Black Knight’s Prison Tower Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6085 – Back C

July 13, 2021October 28, 2021 Master Builder 6469 Views

From: 6085: Black Monarch’s CastleName: Black Knight’s River Crossing Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6085 – Back B

July 13, 2021October 28, 2021 Master Builder 6566 Views

From: 6085: Black Monarch’s CastleName: Black Knight’s Joustling Grounds Instructions: View PDF

Alternate Builds Black Knights Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6085 – Back A

July 13, 2021October 28, 2021 Master Builder 6987 Views

From: 6085: Black Monarch’s CastleName: Black Monarch’s Flagship Instructions: View PDF

Alternate Builds Extra Large Alt Build Extra Large Builds Futuron Futuron Alternate Builds Instructions Added Space

6990 – Back B

August 30, 2020March 10, 2025 Master Builder 5230 Views

From: 6990: Futuron Monorail Transport SystemName: Monorail Surveyor System and Rail Runner Instructions: View PDF | Download .io File

Alternate Builds Castle Castle Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added

6080 – Back C

October 5, 2019October 25, 2021 Master Builder 8129 Views

From: 6080: King’s CastleName: King’s Guarding GroundsSubmitted by: matt_0937Instructions: View PDF | Download .io File

Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6985 – Back E

September 28, 2019May 19, 2023 Master Builder 6195 Views

From: 6985: Cosmic Fleet VoyagerName: Cosmic Fleet Flagship Instructions: PDF (Photo Sequence)

Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6985 – Back D

September 28, 2019November 18, 2021 Master Builder 5994 ViewsExtra Large Alt Build

From: 6985: Cosmic Fleet VoyagerName: Cosmic Fleet Starbase Instructions: PDF (Photo Sequence)

Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6985 – Back B

September 28, 2019November 18, 2021 Master Builder 5216 Views

From: 6985: Cosmic Fleet VoyagerName: Cosmic Fleet Discovery Jet Instructions: PDF (Photo Sequence)

Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6985 – Inside B

September 28, 2019November 18, 2021 Master Builder 4786 Views

From: 6985: Cosmic Fleet VoyagerName: Cosmic Fleet Surface Research Lab Instructions: PDF (Photo Sequence)

ABCs Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6985 – Inside A

September 28, 2019August 16, 2023 Master Builder 7022 Views

From: 6985: Cosmic Fleet VoyagerName: Cosmic Fleet Dragon Instructions: PDF (Photo Sequence) *Alternate Build Connection: 1987 Town, Castle, and Classic

Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space

6985 – Back A

September 28, 2019November 18, 2021 Master Builder 5711 Views

From: 6985: Cosmic Fleet VoyagerName: Cosmic Fleet Explorer Instructions: PDF (Photo Sequence)