The year is 1968. You find yourself aboard a damaged West German Type 205 U-Boat. You’ve set out for the Baltic Sea, keeping an eye on those socialists from the DDR just next door. Then, the incident happened.
Somehow, you are the only one who survived, the dead bodies of your Kameraden all around. The boat lays still on the sea floor, water dripping from the ceiling. You cannot escape and have to wait for the rescue team. To make yourself know, you have to find the Funkboje first and launch it to the surface to send an S.O.S. Until then, you have to survive, both physically and mentally.
Below 459 is a GM-less, solo journaling ttrpg played with a set of cards, a d6, and a tumbling tower.
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Safety: This game includes themes of isolation, narrow spaces, despair, violence, death and ideological conflict.
Source: The Developer Website.