Like DarkBloodbane, my games are usually action based and the play session range from 5 to 30 minutes. Red Balloon of Happiness is a horror game you can complete in 15 minutes.
Viewing post in How long do your games last?
Yes, I realise that for horror games, that’s the perfect length to keep the atmosphere intact... The thing is, my game has some horror elements, but it’s mostly about mystery and exploration, which is why it ended up being so long... It also depends on how long it takes the player to solve the puzzles; some of them are really tricky.