Portal Part 2: Test 18 to before Boss

I continue my playthrough of Portal, by finishing the last Test Chamber and making my way around the labs to the Final Boss. I'm playing on Steam and using a PS4 Controller
#yoitsel #portal #valve #steam #gamingpc #portals #portalgun #puzzle #puzzlesolving #playthrough #letsplay #companioncube #thecakeisalie #playstation4 #pc #pcgaming