Favorite Free Games (Completely Free, no Microtransactions, Trials, Upgrades, Demos, etc...)

I went through 5 pages on this forum and decided that was enough to warrant making a new thread on this (I think there was one a long time ago).

Starting off I'd like to direct anybody interested in a quirky platformer with a dash of puzzle to go download Eversion: http://zarat.us/tra/offline-games/eversion.html
Good way to spend an afternoon or two. 
Tip: You haven't finished the game until it says "The End"

And here's another platformer that is the polar opposite of a cake walk:
http://kayin.pyoko.org/iwbtg/downloads.php
Tip: Give up before you even download it.

And finally a free multiplayer FPS with a focus on rebuilding the environment to suit your needs: http://www.celestialimpact.com/?page_id=3
Tip: Great for LAN play.

8 Bit Killer

Looks, feels, and sounds like Wolfenstein 3D.

A fun little game, good way to spend an afternoon.  There are a few glitches (I got stuck to the wall right after beating the sewer boss once) but it is quite playable and is finished.

http://store.steampowered.com/app/13140/

iSketch yo.

And some obscure game called Mun.

Can someone remember the really scary horror game that you played in your browser? It was something like "room 666", or something like that. You had to give them your email address, but it was really good. I couldn't play after a little while, because it was so creepy.

http://www.1up.com/do/feature?pager.offset=4&cId=3174065

http://www.1up.com/1upblogs/6/1ups_free_and_indie_gaming_blog

/thread

Warzone 2100. RTS with a heavy emphasis on artillery.

Minecraft

oh wait that isn't free

iSketch
Battle Field Heroes
And this game that's basically tribes.. but I forget the name, tlr knows.

Is it called Tribes 2?