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This is a SST Laboratories E54 Bastion. A real nasty piece of work. During the Omnic Crisis, even the best militaries in the world had trouble with them.
~ Torbjörn

A Bastion E54

The Bastion Siege Automaton E54 is a type of omnic.


Standing at roughly four times taller than the average human,[1] Bastion robot units possess the unique ability to rapidly reconfigure themselves into an assault-cannon mode.[2] The Bastion remains equipped with a sub-machine gun in bi-pedal form.[3] It is immune to small arms fire, possesses a self-repair function,[4] and can access the databanks of other Bastion units.[3] They were programmed to fight against any odds until they were shut down.[4]


The E54 was originally created by SST Laboratories for peacekeeping purposes;[2] Torbjörn Lindholm was among those who worked on their creation.[4] During the Omnic Crisis, they were turned against their human makers, forming the bulk of the omnics' rebel army.[2] Even the world's best militaries had trouble dealing with them, and the Bastions never retreated in battle, simply advancing on the enemy until they were destroyed.[4] Following the resolution of the crisis, nearly all of them were destroyed or disassembled. To this day, Bastion units still symbolize the horrors of the conflict.[2] In the decades following the war, many false sightings of Bastion units were reported in Sweden and/or other European countries.[4] There is only one E54 Bastion unit still alive. This is the Bastion found playable in the game.


  • The playable hero Bastion is an E54 model from the Omnic Crisis.


  1. EGO® Overwatch® Omnic Bastion 75987 Building Kit (182 Pieces), Blizzard Entertainment. Accessed on 2018-12-10
  2. 2.0 2.1 2.2 2.3 Bastion, Blizzard Entertainment. Accessed on 2017-05-07
  3. 3.0 3.1 The Last Bastion
  4. 4.0 4.1 4.2 4.3 4.4 Bastion: Binary