In an attempt to be frugal and stretch my gaming hours even further I've been looking into F2P games lately.

1. King Arthur's Gold: Like Terraria it has a Minecraft + 2d Platformer vibe going on, except the game is centered around class-based team-deathmatch. Mining for gold and rocks is never quite as fun as when you are dodging catapults and arrows.

http://kag2d.com/

2. Star Trek Online: It is F2P now, and available on Steam. The space combat is similar to Pirates of the Burning Sea. It must be said that the largest reason I like the game is that I like Star Trek. If I didn't, the game probably wouldn't be as fun. If you like Star Trek give it a try, if not still give it a try, but I'm not promising you'll like it.

http://startrekonline.com/f2p

http://store.steampowered.com/app/9900/

Others worth mentioning;

Everquest and EQII

Aion

Games to keep an eye on:

Tribes Ascend

SMITE

Planetside 2

Mechwarrior Online

Firefall

Also Planetside 2 and Firefall are accepting Beta Apps, so go fill one out.

http://www.firefallthegame.com/home

http://www.planetside2.com/

I feel as though this is a scam. D:

F2P just means you gotta pay for content ;D

don't forget League of Legends!

and D.C. Universe

And your hand!

to follow up on Mr. Pho, I'm actually havin a lot of fun with Star Trek Online and of course, League of Legends.  They just pushed out a major update to Tribes: Ascend, so that game is looking good as well, even though it's still in beta.  really lookin forward to planetside2 and firefall too

Just read today that Hawken will be coming out at the end of the year, and it will be free-to-play!

http://www.hawkengame.com/

http://venturebeat.com/2012/02/06/meteor-games-to-publish-high-end-online-game-hawken-exclusive/

Also make sure to enlist for the closed beta!

https://www.playhawken.com/?ref=yeebh6pd

Man, Fisty, you would offer up a game with the acronym "LoL"

I need 1 more person to sign up for the Hawken beta, though the link provided above and I can register my account in advance!

Also, for Firefall, everyone register for the beta! When/if you get accepted you will be given 3 additional beta keys to share with your RTR breathren.

Well i signed up with pho's link so now i need 3 people though this link--> https://www.playhawken.com/?ref=iisd6tai

Just came across this, http://www.facebook.com/tribesascend?sk=app_126443417467788

free closed beta keys for Tribes Ascend.

Looks like you get two free friend keys as well once you sign up through the above link.

I recommend anyone that is interested in Firefall go register on their forums. People are practically throwing betas around like hotcakes. Some require a bit of effort (posting a funny .gif in a thread for example), but they are pretty easy to come across. I'm currently waiting on a PM to get my beta key!