Back to testing | Portal 2 | Ep 1

More portals. Portal 2 on steam: https://store.steampowered.com/app/620/Portal_2/ outro1: https://www.youtube.com/watch?v=-u1zMy6PpX8 outro2: https://www.youtube.com/watch?v=I67UexqArvY&list=RDI67UexqArvY&start_radio=1 outro3: https://www.youtube.com/watch?v=Ocdfa6_T5oI transition audio: https://www.youtube.com/c/kmmusic/videos