All the servers are only accessible at the LAN for now, they're are all vanilla servers so no mods let see how you do going back to basics.

So here's the games line for you:

Modern Warefare 3

Call of Duty: Black OPS 3

Counter-Strike Source

Counter-Strike:Go

Tf2 / Payload Race / Payload / Capture Point / Attack and Defense

DOD:

Source

HL2 DM

Quake 3 Rocket Arena / Threewave

Quake Live

Xonotic

WarZone

Golf with friends

UT - Facing Worlds

Ghost Hunters

Phasmophobia

Among Us

Reck Fest

Split Gate