Both Eul and Icefrog assigned their copyright of to valve while getting employed at them, Guinsoo assinged them to Riot who then transferred the rights to Blizz

Both Eul and Icefrog assigned their copyright of to valve while getting employed at them, Guinsoo assinged them to Riot who then transferred the rights to Blizzard. And as far as I know Valve have only only done any kind of claim jointly with Blizzard as they are not the sole owners of the copyright. They are though owner of the Dota 2 trademark. Also a nitpick there have been more maintainers than those three they were the major ones for example the original developers of Dota Allstars Meian and Madcow. Guinsoo worked on the game for around 2 years until early 2005 and then Neichus took over and worked jointly with Icefrog who became the lead after Neichus left. Main source: https://assets.documentcloud.org/documents/3726401/BlizzardvLilith.pdf https://assets.documentcloud.org/documents/3726401/Blizzardv...