The relay saying "packets" made me think can you send a program to a computer making a in game internet?

You can, it just needs a little work from the user.

OpenComputers has huge potential for what you can do. The mod just gives you the basics and it's up to you to implement it.

The relay saying "packets" made me think can you send a program to a computer making a in game internet?

YES! For example, I made a simple server/client program that works similarly to "pxe" on real computers, it allows me to download programs larger than the eeprom size. it helps a lot when working with drones.

I made a game once, in OC. It was on an old multiplayer server. Basically, I had a few server racks with different servers in them (T2s). People could connect using a command and then play the game with other people. It took me a while to do it, but it worked.