Kogama Portal 2
Passing "Kogama: Portal 2" without other online users is simply impossible. To play, you will need a partner, because to disable traps and open doors (even to the toilet) you need the help of a second character. And, for free. For example, while one will stand on the button that turns on the bridge over the acid pool, the second will move to the other side and press the same button. Therefore, between gamers in Kogam, peace and mutual understanding are important. This is the main difference between Portal 2 and other Kogama projects. Finding the right solutions won't take long. Hints are written on the walls. To make it easier to play Portal 2, you should turn on the chat. It works in Kogama games for free.