Using a power strip in an old home that was build back in 1955

I had to work through that same problem being my house was also built in the 50’s.

I guess it is a common practice to replace two prong receptacles with three prong receptacles to increase the homes resale value. I was pretty pissed to find that out after purchasing my house that all the outlets other than the ones in my basement, bathroom, and kitchen were not properly grounded.

I hired an electrician and they ran ground lines for the outlets in my AV room it was only a couple of hundred dollars because the breaker box had already been upgraded.

It sounds like OP that you seem to have some concerns with the way you are solving your problem or you would not be here asking for our advice? Cheers

I'm just brainstorming ideas at this time.

Here is an ideal setup

playstation 1 with upscaler - 2 plugs

playstation 2 - 1 plug

playstation 3 - 1 plug

playstation 4 with vr - 2 plugs

playstation 5 - 1 plug

tv - 1 plug

dvr - 1 plug - 8 plugs total

or 

nintendo system with upscaler - 2 plugs

super nintendo with upscaler - 2 plugs

nintendo 64 with upscaler  - 2 plugs

nintendo gamecube - 1 plug

nintendo wii - 1 plug

nintendo wii u - 1 plug

nintendo switch - 1 plug

tv - 1 plug

dvr - 1 plug - 12 plugs

Not all device would be on at the same time.

More important than ground for safety is proper polarization. I remember the old days of finding the quietest orientation for each plug.  And shocking PA systems.

I'm on here asking for tips mainly. If I was an expert, I wouldn't be on here.