Here's a bunch of multiplayer games I've got.
I don't know your taste in games, but almost all of these are shooters of some form or another.
The question mark means that one of the games in the series may or may not be multiplayer/may or may not have servers.

Broforce
Metal Slug?
Raiden 3?
Skullgirls?
Terraria
Audiosurf 1/2
Bioshock?
Cities?
The Sims?
Borderlands
Dead Island?
Enter the Gungeon
Far Cry
GTA
Alien: Isolation?
Cry of Fear
Just Cause
Left 4 Dead
Simply Chess
War Thunder
XCOM
Star Wars
BattleBlock Theater
Chivalry
Counter Strike
Dirty Bomb
Don't Starve Together
Gang Beasts
GMod
Payday 2
Rust
Team Fortress 2
Arcade Game Series?
BeamNG.Drive?
I am Bread
Portal 2
Castle Crashers
Dying Light
Saint's Row
Brink
Planetside 2
SYABH
The Ship
Astroneer

I am a heron. I have a long neck and I pick fish out of the water with my beak. If you don't repost this comment on 10 other pages, I will fly into your kitchen tonight and make a mess of your pots and pans.

SMASH DAT LYK O R U A KYK-Y ♥♥♥♥????

SmASSHH LYKKEE!!! Who upppsS?S??