[METRO.744] ...

In a recently uncovered storage unit deep within the METRO●LABS facility, a series of early concept dossiers and schetsen were found. These pertain to five models, indexed METRO.744 through METRO.748.

The files consist primarily of hand-drawn schetsen, preliminary algorithm flowcharts, and partial behavioral frameworks. There are no operational cores, no completed hardware units, and no activation logs.