F-Stop was supposed to be the sequal to Portal with a new gameplay mechanic.

If you want taste of what F-Stop was supposed to be, Superliminal is apparently kinda close to the concept.

I can say some zigbee plugs have terrible/problematic antennas. I had a situation where:

Plug A <------> Plug B <-> Plug C, where B would have connetion issues but

Plug A <------> Plug C <-> Plug B would be solid

It maybe be that my selected zigbee band is not optimal for every device I use. That could also effect the range/signal strength