Summer Eternal is a video game developer based in Zagreb, Croatia. It was co-founded in 2024 by Argo Tuulik and Dora Klindžić, former employees of the Disco Elysium developer ZA/UM, as well as Aleksandar Gavrilović, owner of independent game studio Gamechuck. As of 2026, several former ZA/UM staff members collaborate with Summer Eternal, including writer Olga Moskvina, concept artist Anastasia Ivanova, graphic designer Michael Oswell, audio designer/writer Andrus Laansalu, and programmer Jaagup Irve (credited as author.)
History Summer Eternal was first publicly revealed on 11 October 2024, and is one of several studios founded by former ZA/UM staff following the release of Disco Elysium. Its first press release included the founding members' manifesto and a breakdown of the studio's worker-run structure.
In September 2025, the studio announced the title of its first role-playing video game, Red Rooster. More information about the project is to be revealed in the studio's first anthology, Summer Eternal Anthology Volume One, to be released in 2026.
Organization Summer Eternal is organized as a cooperative; creatives have a 50% stake in the company, collaborators 25%, investors 20%, and players 5%. The 5% "player owned" stake is formally held by a non-profit organization. Registered players can assist in the organization and investments of the studio, but do not receive any share in company profits.
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