Maybe I missed something? I thought I cleared every level I visited.
And yet, I ditched 1 red keycard in Beyond and never had a use for it.
CALLISTO L4 -> Military Barracks
Military Barracks - cleared
EUROPA L4 -> Refueling Base
Refueling Base - cleared
IO L4 -> Io Warehouse
Io Warehouse - cleared
BEYOND L2 -> Limbo
Limbo - cleared