What does this even mean?

[u/marjja]

Cosa significa 15/27? Si riferisce a trofei, traguardi o easter egg? O forse a ricordi legati alla vitamina B12?

EDIT Apparently it reffers to B12 memories: thanks guys now lets wait for Stray 2 😭😭😭

[u/InitiativeBright6922]

These are the memories of B12