Someone for the coop achievements? / Alguien para los logros cooperativos?

Free hug

i cant win

快速转动视角屏幕会模糊

can someone help me get achievements

Portal Physics & Chemistry

Looking for co-op achievements partner

guys we need a remaster of portal called apeture science

Hi folks, sorry to interupt but i think I'm lost?

Anyone never played coop before? Help w Achievment

Professor Portal Request

I NEED PEOPLE IN MY FRIENDLIST FOR MY ACHIVEMENT STEAM "FREEHUG" x2

Anyone Never Played Co-op Before? (Achievement Help)

portal master achievement