For anyone who thinks GameNET is a bit underpowered, slot Shipment from Tennin in. GameNET's strength isn't in it's infinite economy, it's in its ability to be paid for something that's going to happen anyway. So you want to make sure that something happens as quickly and as frequently as possible. Glacier isn't the way to go with GameNET and its 17 influence, Fast Advance is.
As much as I gush about MCA Austerity Policy, it's too slow for GameNET and doesn't force enough runs. CalTest and BassC are both out for the same reasons. You don't want to create a single target that turns off the Corp's FA, you want to threaten from as many avenues as possible. You want Operations since those can't be trashed normally and force the Runner to check HQ, R&D, and remote for agenda. Remastered Edition is worth a mention for being an agenda that advances the train. FA works because GameNET gets paid while the Runner works to stop the FA train, eliminating one of the biggest weaknesses of FA. The fact that GameNET's ICE suite makes repeated runs especially painful is just icing on the cake.
The main go-to's then are the above mentioned Tennin and Biotic Labor with Tennin being the clear instaslot. Trick of Light works if you can tolerate the added steps and so does Audacity if you think a deck is robust enough for it. Maybe slot in some recursion for the long haul as well.
All in all, I'd argue that GameNET is not only NBN's best FA ID but one of Netrunner's best FA ID's, period. Agree or disagree, glhf mtbmw.