http://penny-arcade.com/patv/episode/games-you-might-not-have-tried-2

I compiled a list of links to make this easy (their forum posted included a bonus game not shown in the video, so I included it as well). I don't have thoughts on all of these as I've not played them all, played their demos, or didn't even know about them, but here they are:

Outland - http://www.housemarque.com/games/outland/

Terraria - http://www.terraria.org/

Kingdom of Loathing - http://www.kingdomofloathing.com

Metro 2033 - http://metro.thq.com/ it looks like this site is now dedicated to Metro Last Light and 4A Games' website seems to be down

Depths of Peril - http://www.soldak.com/Depths-of-Peril/Overview.html (demo appears to be available)

Monday Night Combat - I don't know how you cannot have heard of this one, but yeah, it's awesome, Super MNC is now using MNC's space at http://www.mondaynightcombat.com/ but there's a wikia for it at http://mondaynightcombat.wikia.com/wiki/Monday_Night_Combat_Wiki

Trenched - out of all of these games, if you just play one, play this one, demo available on XBox Live, it's a great demo but doesn't do the full game justice, http://trenchedgame.com/

OGame - http://www.ogame.us/

World of Tanks - http://www.worldoftanks.com/

The Cat and the Coup - http://coup.peterbrinson.com/

Earth Defense Force 2017 - http://www.earthdefenseforce.net/

Panzer Corps - http://www.slitherine.com/games/panzer_corps_pc at least I think this is it

Runespell: Overture - http://www.runespell.com/category/game/
Catherine - How can you not have heard of this whacked out game by now http://www.catherinethegame.com/

Monster Hunter Series - http://www.capcom.com/monsterhunter/ This site is one of the odder flash experiences of my life!

Bastion - http://supergiantgames.com/?page_id=242 You should by this and a soundtrack signed by the team! No, really, I know I already gave my "out of all these games" thing to Trenched, but if you're not going to play Trenched, play this!

The Stanley Parable - this is some odd HL2 mod, http://www.moddb.com/mods/the-stanley-parable

Rock of Ages - http://www.atlus.com/rockofages/ This demo didn't really grab me, but the art, if it appeals to you, might make it worth playing all by itself


And if you've read this far, you probably deserve a link to part 1 of this video:

http://penny-arcade.com/patv/episode/games-you-might-not-have-tried-or-heard-of

Only one on this list I want to try but havent is bastion, waiting for it to go on sale cause i doubt ill like it

Dude, thank you for reminding me about Extra Credits... I seem to have forgotten about them, gonna watch a few dozen episodes tonight.

Funny that the free games "The Cat and the Coup" & "The Stanley Parable" both use tracks from Nine Inch Nails' Ghost I series (under Creative Commons license). I guess it's just too cool to resist; we might see a lot more use of it in games ... :D

Thanks for the link! I didn't know about "The Stanley Parable" yet and I'm going to check it out.

I had no idea those were NIN tracks, cool!

Yeah The Cat and the Coup looks weird as hell, but now I kind of want to play it.

The Cat and the Coup is pretty interesting. I highly recommend The Stanley Parable. It's interesting, although it ultimately felt unsatisfying. The narration style is similar to Bastion's, I believe.

Edit: Terraria is great fun, although it doesn't have enough end game content (unless they've added more since I last played). Rock of Ages is okay, but not great. It has an interesting art style to it though.

I wasn't personally a fan of Metro 2033, but some people can't get enough of it.