Portal is a first-person puzzle game. Players must solve physical challenges by opening portals to maneuver objects, and themselves, through the enigmatic Aperture Science Laboratories.
Half-Life 2 maps in game Portal. Modified menu select chapter for the Czech, English, French, German, Italian, Polish, Russian and Spanish languages.
why is it in Russian
it's probably that the person just plays it in russian.
Add the instruction to get the maps from HL2 and put them in portals since otherwise it doesn't work