Only 15% of Steam playtime in 2024 was dedicated to new games, a slight increase from 2023. Steam users spent 47% of their time on games 1-7 years old, and 37% on games over 8 years old.
RTS leads the way in Steam's Real-Time Strategy Fest, but there are also grand strategy games, 4X, tower defense, city management, and even a typing game.