Beginning of time until 4 million B.C.. Unicron the Chaos-Bringer devours the universe, sleeps.
Primus is created, does battle with Unicron, tricks him into being trapped in a planetoid
Unicron eventually makes his planetoid able to transform into a shape of himself, Primus makes his turn into Cybertron, creates the Transformers, Vector Sigma, and the Creation Matrix (Autobot Matrix of Leadership), secures the latter within Vector Sigma, goes to sleep to hide himself from Unicron. Liege Maximo created as an offshoot of Transformer race.
Quintessons are created by Unicron as worshippers, but they soon revolt and escape. Land on Cybertron, enslave the Transformers, learn how to build new ones using Vector Sigma, separate them into war and worker robots
Transformers led by Alpha Trion revolt, win and drive off Quintessons. Golden Age of Cybertron.
Decepticons (warlike robots) begin to take over, Alpha Trion discovers Matrix and finds out its power, Megatron created using Vector Sigma, key stolen by Alpha Trion, hidden so Creation Matrix the only force to grant life
Orion Pax injured in explosion, Alpha Trion repairs, becomes Optimus Prime, leads Autobots to victories over Megatron, is passed the Matrix from Alpha Trion
4 million BC-1985 Prime leads Autobots off Cybertron in Ark. Megatron intercepts, Ark is sent crashing into Earth
Jhiaxus and the Second Generation Transformers created through spawning. Leave Cybertron and go on search through universe. Align themselves with the Liege Maximo.
Swarm created as an offshoot of spawning, begins voyage through universe
1985-1994 Decepticons awakened aboard Ark, repair, left, Autobots repaired, begin fight on Earth, met Sparkplug, Buster (in college), and Spike Witwicky
Events of Transformers pre-movie TV series: battle on Earth, creation of Dinobots, Aerialbots and Stunticons, Alpha Trion merges with Vector Sigma, key to V.S. destroyed, etc.
Comic events: Prime killed in video game fight with Megatron, body launched into outer space w/ Matrix, Grimlock assumes control of Autobots
Headmasters on Nebulos created, Scorponok and Fortress Maximus both are leaders of Decepticon and Autobot groups. Lord Zarak becomes head of Scorponok, Galen becomes head of Fort Max. Bring fight to Earth, Buster becomes headmaster of Fort Max after death of Galen.
Matrix lands on VsQs
Prime reincarnated through Powermaster process, becomes binary-bonded to Hi-Q
Underbase saga
Ratchet and Megatron supposedly die in explosion
Grimlock, Bludgeon, etc. awaken Primus, alert Unicron of whereabouts
Search for the Matrix begins
Eventually Thunderwing gets it, returns to Ark to fight, shot into outer space
Prime learns the only way to stop Unicron is to unite all Transformers, Ratchet and Megatron are found, separated
Galvatron found in alternate reality by Unicron, brought back by Hook, Line and Sinker
Autobots surrender to Scorponok and the other Decepticons
Grimlock locates Nucleon, gives to Dinobots, puts in stasis pods with other Autobots and Megatron
Fight on Earth: civil war between Decepticons, Neo-Knights become involved, all transported to Cybertron by Primus acting on Galvatron�s command
Fight with Unicron, Scorponok killed among others, Prime gets back Matrix and clears it of evil, destroys Unicron
Prime found dying, names Grimlock new leader, find Hi-Q whose mind has permanently bonded to Prime�s, Decepticons double cross Autobots, leave them on Cybertron
Ark carrying Megatron, Ratchet, Galvatron, Shockwave, and Starscream plummets to Earth, Fortress Maximus/Buster throws Galvatron into Alaska�s icy waters
Grimlock and others pursue Decepticons, Neo-Knights and Hi-Q/Optimus Prime find Last Autobot, build Prime a new body
On Klo, Autobots being devastated by Bludgeon and his troops. Grimlock, Blaster, Slag, and Prowl are the only remaining survivors. Prime, Neo-Knights and The Last Autobot arrive and take names
Autobots return to Cybertron and second Golden Age begins, Last Autobot/Primus puts essence into a new Creation Matrix
1994-1996 Ratchet is found in Ark, repaired on Cybertron
Megatron escapes wreckage, repaired by Cobra, able to transform into tank
Optimus Prime and Autobots discover Cybertronian empire belonging to Jhiaxus and his army
Megatron steals Ark and leaves Earth, repairs Starscream and Shockwave, Buster melds with Fortress Maximus one last time and sacrifices himself to stop Megatron, fails
Bludgeon attacks Earth in order to bring Prime out of hiding, who is discovering origin of Jhiaxus and the Second Generation Transformers
Megatron sends Shockwave to Cybertron, Bludgeon is killed by newly built Megatron, Megatron steals Creation Matrix from Prime
Jhiaxus attacks Megatron, Decepticons and Autobots join forces against Cybertronians, Prime is returned the Matrix from Starscream
Swarm arrives, destroys Jhiaxus, Optimus is engulfed in Swarm, contacts it through Matrix, Swarm rebuilds Prime, Rook travels to the Hub to inform Liege Maximo of battle
Primacron rebuilds Unicron (Second Coming)
1996-2005 Autobots and Decepticons join forces against Liege Maximo�s army, Prime and Megatron face off against the titan, destroy him but are seriously wounded, are rebuilt on Cybertron into their original forms, try and form alliance. (Second Coming)
Decepticons plot against Autobots, eventually take Cybertron. Autobots gain control of Cybertron�s two moons and build Autobot City on Earth
Nebulos taken control of by a group known as the Hive. A small rebel group fights against the Hive, dwell on the outskirts of the main cities.
2005 Events of Transformers: The Movie, Second coming of Unicron, Hot Rod becomes Rodimus Prime and destroys Unicron, throws Galvatron through Unicron. Unicron�s head orbits Cybertron. Begins Third Golden Age of Cybertron.
2006-2010 Galvatron discovered on planet Thrull, has become insane, begin second war with Autobots led by Rodimus Prime. Quintessons relationship to Transformers revealed. Optimus Prime is used against the Autobots, but is foiled when Prime reverts against programming. Optimus Prime reincarnated during Hate Plague crisis, empties Matrix of Primus�s energy and wisdom to combat plague.
Events of Rebirth take place, with Lord Zarak�s son (also known as Lord Zarak, leader of the Hive) becoming the vastly improved and much larger Scorponok�s head. Blames Autobots (especially Optimus Prime) for death of his father. Fortress Maximus II is built out of city by Cerebros and Spike, become Headmasters and combat Scorponok, Fort Max is victor, Galvatron and Decepticons sent flying through space. The Headmasters disband, and all Nebulans return to their planet with Fort Max/Cerebros as protector. Witwickys go home to Earth. Optimus Prime leads into Fourth Golden Age of Cybertron: Great War is over?