Unturned was first publicly released by developer Nelson Sexton on Steam Early Access.
A significant update bringing major improvements and changes to Unturned, including new regions and enhanced gameplay mechanics.
Unturned officially left Steam Early Access, becoming a fully released game.
Next major iteration of the game featuring improved graphics, a new map 'Washington,' and modernized gameplay elements.
Nelson Sexton announced plans and early development for Unturned II, a sequel with significant graphical and engine upgrades.
A mysterious and highly contagious infection spreads rapidly, turning most of the population into zombies.
Small groups of survivors begin organizing for protection and resource sharing as the infected overrun cities.
Governments and military forces create fortified safe zones to protect uninfected civilians from zombie hordes.
Scientists develop a prototype cure that shows promise in reversing the infection in early trials.
Satellite and internet infrastructure fail, isolating survivor communities worldwide.
Militia groups begin to dominate certain regions, sometimes violently competing for resources and territory.
A military faction known as the Knight Sector emerges to enforce order and secure key areas.
Survivors discover large underground bunkers providing shelter, supplies, and protection from infected.
Secondary infections and mutations cause biohazard zones, creating additional threats beyond zombies.
Illegal trade of weapons, medicine, and rare resources flourishes among survivors.
Global survivor groups collaborate to improve the prototype cure into a widely deployable vaccine.
A small group of survivors naturally immune to infection is discovered, opening new research pathways.
Vaccination and natural immunity lead to a slow decrease in infection rates in many regions.
