Testing Shaft Alpha Romeo image - Critical Error mod for Portal 2

Critical Error is a Portal 2 mod set in a collapsing, derelict Aperture Science. Critical Error takes place many years after Chell escapes the facility. You are a male test subject, automatically woken up by a cryogenic failsafe. Your sole companion is Mithun, a prototype personality core from before the Enrichment Centre. You try to reactivate the power, but in doing so cause an already-fragile containment structure to break and you plummet into Old Aperture. Now your goal is to explore the Old World, through rusted ventilation shafts, tight crawlspaces and forgotten maintenence corridors, and find a way to escape the long-forgotten and sealed up underground.