Do you know any dead games?

God Mode

Monday Night Combat. No, not the MOBA-style F2P, but the original. That was a simply awesome game but the servers slowly croaked due to the "nobody wants to sit in a half-empty server for 30 minutes and hope enough others join to make it fun" deal. The last few times I checked in, there were zero servers. I dunno if there was some kind of hiccup with the server browser, but it seemed dead. Which is a crying shame.

Shattered Horizon scratched a specific tactical itch of mine, but it's playerbase dwindled fast and without a big variety of populated servers, people lost interest. Granted, the game could be mystifying to people who couldn't get the right mindset, and all it takes is a single exceptional player to frustrate the bejesus out of everyone else.

Half-Minute Hero, because MP is utterly broken. The sequel also co-opted some maps and improved them.

Bloodline Champions, best multiplayer game I've played!

Return to castle Wolfenstein

Shoots Many Robots (MP is kinda dead and I can't finish achiev :)

The darkness 2 completely dead

dead island, dead horde, house of the dead, left 4 dead, walking dead, dead space, dead rising, dead state, dead pixels...

Worms Clan Wars & Worms Ultimate Mayhem - Sadly both have a really small player base, stupid community who can't acceppt innovations.

Operation Flashpoint Dragon Rising and Homefront - Both underrated games that I really enjoyed and both dead.

Severance: Blade of Darkness

Takedown Red Sabre :(

CALL OF JUAREZ THE CARTEL

World in conflict

Magicka :( Alien Vs Predator 3 :( etc ( multiplayer ye?) ( to the dude who wrote teamfortress 2 wtf that game sucks,TF2 & minecraft are abbherations)

Rise of the Triad is active on Saturdays because of Saturday Night ROTT event, but other than that, it is kind of dead most of the time. I wish TotalBiscuit would put an annotation or something on his ROTT video because all of the bugs and performance problems have been fixed, and it even just got its 4th free dlc. I think the game didn't sell as well as it should have because of his video :(

Nexuiz, Starvoid, Gun Monkeys

Ace of Spades

Outcast. It was my childhood, but even most of the gamers doesn't know it.
There is a kickstarter campaign for a decent remake. https://www.kickstarter.com/projects/outcast-reboot-hd/outcast-reboot-hd

Operation Flashpoint series.

Rainbow Six 3 Ravenshield

The Misadventures of P.B Winterbottom - amazing indie puzzle platformer from days when indie games weren't in or cool, noone know this game which is weird, amazing stuff.

Noitu Love 2 - Devolution - another hidden indie gem

Aquaria - old, forgotten, but still great game

XIII - one of the best FPS ever created, based on comic of same name. Ubisoft never created a sequel for this game, what a shame.

Red alert 3 is about to be killed by EA :(

Dungeonland

Nintendo is removing the online component of all Wii (not Wii U) and DS (not 3DS) games at the end of this month. RIP Mario Kart DS and Super Smash Bros Brawl.

Archeblade, the game died after 1 week of official release on Steam.
Which means, that there won't be any updates or customer support.

lotro is as good as dead.