War Thunder

War Thunder is a free-to-play vehicular combat MMO featuring aircraft, ground vehicles, and naval craft spanning from the early 20th century to the modern era. Players progress through technology trees across multiple nations, unlocking increasingly advanced military vehicles. The game offers three realism tiers for each vehicle type: arcade, realistic, and simulator modes. Originally developed as a flight simulator under the name "World of Planes," the game expanded to include tanks in 2014 and naval forces later, becoming a combined-arms experience. A mobile version was released in 2023.

War Thunder is estimated to have 200k – 720k players a day. Around 8m – 21m accounts have played it in total. The range is anchored on Steam’s official concurrent-player and review counts, then converted to daily actives and accounts — so it covers the Steam player base and will under-count a game played mostly through its own launcher or on console.