While some sites list it as "free-play," it is important to distinguish between the versions:
Unlike traditional online games, The Past Within does or shared servers to play. The Past Within - Apps on Google Play The Past Within Free Download (Incl. Multiplayer)
is a unique departure for the Rusty Lake universe, serving as the studio's first strictly co-operative asymmetrical puzzle adventure. The "Free Download" Context While some sites list it as "free-play," it
This is a free demo version offered by the developer. It provides roughly 15–30 minutes of gameplay with content distinct from the main game, allowing players to test the co-op mechanics before buying. Unique Multiplayer Mechanics The Past Within Free Download (Incl. Multiplayer)