How long does it take to finish Only Up

The time it takes to complete Only Up can vary significantly depending on the player's skill level and playstyle. Here are the details:
According to the Game Developer: The developer of Only Up has stated that the game has 40 to 120 minutes of gameplay.

Based on Player Experience

Main Story Completion: On average, it takes players about 5½ hours to complete the main story. The fastest recorded time is 1 hour and 6 minutes, while the slowest is 15 hours and 30 minutes.

Completionist Playthrough: For those aiming to explore every aspect and secret, it may take around 6 hours on average, with a range from 3 hours and 57 minutes to 7 hours and 35 minutes.

Speedruns: The current world record for speedrunning Only Up is about 18 minutes.

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