Just a couple of free games

[Arcisal]

Was checking out some free games which I thought might be worth trying.

SCP: Containment Breach
I have not personally played this game, thought from the videos, I can bet that it's pretty effective it achieving the scary-ass shit-your-pants atmosphere. That and the helplessness of not having a weapon while some yellow martian is friggin teleporting in front of you when you turn around makes it pretty cool.

Path of Exile
A free MMORPG that is set to release a public beta in 2 days (as of this post). I'll be watching this eagerly.

Grim
A free Online FPS made by 6 university students using UDK. The game currently features 3 game modes: the classic Deathmatch and Team Deathmatch as well as Breach, a game mode unique to Grim.

 

[Dr Super Good]

You forgot 0A.D....
A WIP RTS in Age of Empires style.

 

[Mechanical Man]

Since you menationed 0 A.D.

Glest especially the latest update, megaglest.

 

[Nuclear]

Tribes: Ascend

 

[TaShadan]

World of Tanks
ZoD http://zod.sourceforge.net/

 

[The_wand_mirror]

Blacklight Retribution

Ghost Recon Online

War Inc.

There is something with free shooters these days.

 

[Arcisal]

Don't forget Slender!

 

[Super-Sheep]

Team Fortress 2. :|

 

[Edhel-dur]

League of Legends. :| :|

 

[MrStormyZ]

Age of Empires Online

 

[Edhel-dur]

Stronghold Kingdoms.

 

[MortAr]

DotA2 :| :| :|

 

[Edhel-dur]

This should be a sticky.

 

[Arcisal]

I think Flash Games come under Free Games as well (?)

Here are some of my favorites:
Coma & Others
The Company of Myself
This is the Only Level
Meat Boy (Yes, there is a Flash version)
Colour My World

As you can tell, I like emotion-evoking games.

EverQuest and D&D Online are also free, though some items still have to be paid for.

And for those of you who like browser-based games, take a look at Tribal Wars and Sryth.