Built to Rule was a building blocks toyline from Hasbro

Hasbro

Hasbro is a multinational toy and boardgame company from the United States of America. It is one of the largest toy makers in the world. The corporate headquarters is located in Pawtucket, Rhode Island, United States...

 that is compatible with such leading brands as Lego

Lego

Lego is a line of construction toys manufactured by the Lego Group, a privately held company based in Billund, Denmark. The company's flagship product, Lego, consists of colorful interlocking plastic bricks and an accompanying array of gears, minifigures and various other parts...

. These sets were released from 2003 to 2005.Sets are usually based upon existing toys and characters from the Hasbro brand, such as Tonka, G.I. Joe

G.I. Joe

G.I. Joe is a line of action figures produced by the toy company Hasbro. The initial product offering represented four of the branches of the U.S. armed forces with the Action Soldier , Action Sailor , Action Pilot , Action Marine and later on, the Action Nurse...

 and Transformers: Armada

Transformers: Armada

Transformers: Armada, known in Japan as , is a Transformers animated series, comic series and toy line which ran from 2002–2003. It was originally scheduled for 2001, however was delayed until early-2002...

. Small number of Transformers: Energon Built to Rule sets were released to test the market, but they were never released widely.

Transformers Built to Rule toys were expected to be big sellers in 2003. It was predicted by some groups to be mong top sellers.

List of Transformers: Armada Built to Rule sets

• Demolishor
  Demolishor
  Demolishor is the name of several different fictional characters in the various Transformers universes.-Transformers: Armada:Demolishor is one of the earliest created Decepticons of the toyline; and in the storyline, also one of the first to come to Earth from his homeworld - the fictional planet...
  
   & Blackout
• Demolishor
  Demolishor
  Demolishor is the name of several different fictional characters in the various Transformers universes.-Transformers: Armada:Demolishor is one of the earliest created Decepticons of the toyline; and in the storyline, also one of the first to come to Earth from his homeworld - the fictional planet...
  
   & Blackout (Night Attack)
• Hot Shot
  Hot Shot (Transformers)
  Hot Shot is the name of several fictional characters in the various Transformers universes. All are young Autobot cars.-Transformers: Robots in Disguise:In Transformers: Robots in Disguise, Hot Shot is the leader of the Spy Changer team....
  
   & Jolt
• Jetfire
  Jetfire
  Jetfire is the name of several fictional characters from the Transformers universes. He is nearly always depicted as an Autobot with jet or space shuttle alternate mode.-Transformers: Generation 1:...
  
   & Comettor
• Megatron & Leader-1 with Cyclonus & Crumplezone
• Optimus Prime
  Optimus Prime
  Optimus Prime is a fictional character from the Transformers franchise. Prime is the leader of the autobots, a faction of transforming robots from the planet Cybertron. The autobots are constantly waging war against a rival faction of transforming robots called Decepticons...
  
   & Sparkplug
• Red Alert
  Red Alert
  -Warning systems:Notable warning systems that use red alerts are:* The Homeland Security Advisory System * The BIKINI state * An emergency broadcast bullentin used by the Emergency Management of Ontario, in Ontario, Canada-Music:...
  
   & Longarm
• Smokescreen & Liftor
• Starscream & Swindle
• Thundercracker
  Thundercracker
  Thundercracker is the name given to multiple fictional characters in the Transformers universes. Thundercracker is almost always depicted as a blue color Decepticon who turns into a jet fighter.-Transformers: Generation 1:...
  
   & Zapmaster

List of Transformers: Energon Built to Rule sets

• Ironhide
  Ironhide
  Ironhide is the name of several different fictional characters in the Transformers universes. According to the original creator of the Transformers names, Bob Budiansky, Ironhide was named after the television series Ironside.-Transformers: Generation 1:...
  
  
• Optimus Prime
  Optimus Prime
  Optimus Prime is a fictional character from the Transformers franchise. Prime is the leader of the autobots, a faction of transforming robots from the planet Cybertron. The autobots are constantly waging war against a rival faction of transforming robots called Decepticons...
  
  
• Skyblast
• Inferno
  Inferno
  Inferno means "Hell" in both Italian and Portuguese, so this word may refer to:*Hell*Conflagration, a large uncontrolled fire.-Literature:* Inferno , the first part of Dante's Divine Comedy...
  
  
• Starscream
• Scorponok
  Scorponok
  Scorponok is the name shared by several fictional characters in the various Transformers universes. All are Decepticons that turn into Scorpoins.- Transformers: Generation 1:...