Portrait of a Lady
Uncommon12.6%ObjectiveOptionalSingle-player
Single Player
Find a hidden portrait
A single hidden portrait of Cave Johnson and Caroline. In old Aperture, after Enrichment Sphere 4 in Chapter 7, portal your way onto a panel beyond a closed gate and slip into the little office tucked behind it - the portrait's on the wall in there. Easy to stride straight past, so make the detour.