Cyberse (サイバース Saibāsu) is a Type of monster, which debuted in Yu-Gi-Oh! VRAINS. Appearance-wise, they resemble creatures and humanoids strongly connected to elements of digital technology and cyberspace. At times though, they tend to resemble other various monster types (most commonly Machine and Psychic monsters, with the humanoids bearing design elements from the TRON franchise). The name is a portmanteau of "Cyber" (サイバー Saibā) and "Universe" (ユニバース Yunibāsu).
Their general theme revolves around swarming the field with weak monsters to easily Link Summon powerful Link Monsters, and they also have lots of monsters that gain effects when banished in a similar vein to Psychic monsters.
In Yu-Gi-Oh! VRAINS, the Cyberse monsters appear to be a special kind of monster related to the Cyberse World. When Yusaku used these monsters in his Duel against the Knights of Hanoi, the spectators were surprised to see him possess Cyberse monsters. As stated by Varis, through currently unknown means the Knights of Hanoi had destroyed a vast amount of them to the point they believed Cyberse monsters to be extinct.
- This is the first new Type to be used by the main protagonist of a spin-off series.