Hi. I'm new here. Anyway, I'm sure at least a few of these have been posted.

Ark 22 (An awesome 2d zelda-like RPG)
http://www.dur.ac.uk/david.smithson/ark22.htm
 
Banana Nababa (a hard, boss only platformer)
http://www.gamingw.net/forums/index.php?topic=63350
 
Last Scenario (A kewl RPG with random encounters)
http://forums.somethingawful.com/showthread.php?s=&threadid=2474929
 
Cannon Cat (right click for machine gun, left click for cannon, click the blue words to start)
http://ishi.blog2.fc2.com/blog-entry-132.html
 
Wilfred, The Hero (A good RPG with a system like FF10)
http://www.gamingw.net/forums/index.php?topic=42700.0
 
Noitu Love And The Army Of Grinning Darns (A kewl beat em up)
http://www.konjak.org/noitulove.zip
 
Gate 88 (a kewl outer space strategy game. Long tutorial but worth it)
http://www.queasygames.com/gate88/downloads.html
 
Hellsinker (a great shmup)
http://www.simulationstyle.com/hellsinker.html?sid=f11869c677f7d89e6d757df098adb77e
 
Commando (a great military platformer)
http://www.reloaded.org/download/Commando/266/
 
The Cleaner (a great shooter)
http://gamemakergames.com/?a=view&id=4733
 
Legend Of Shadow (a hard samurai platformer)
http://gamehippo.com/search/search_title_1_d13d50d3164b2699dd9e666dcc2954ba.shtml

Atomic Tanks - An excellent Scorch 2000 clone that will keep you busy!
http://atanks.sourceforge.net/
 
CloudPhobia - An exccellent shmup with greatly drawn sprites.
http://www.caiman.us/scripts/fw/f1156.html
 
Counter-Strike 2D - A great top down shooter based on Counter Strike.
http://www.csnation.net/cs2d/cs2d.htm
 
DAN! DA! DAN! - A shmup with a bit of Breakout in it.
http://nagoya.cool.ne.jp/o_mega/product/ddd.html
 
El Loco Megabus - A nice looking racing game and a very small file size!
http://www.planetfreeplay.com/game/El-Loco-Megabus/?pfp=d7565a96cac9ed798d0885e7d9bc47d1
 
Final Fantasy 7: The Dark Cloud - A nice sequel to FF7.
http://www.megagames.com/news/show.cgi?&idtype=freegames&database=397&section=downloads&  (copy that into your browser. including the & symbol)
 
GunZ: The Duel - A FANTASTIC online shooter/rpg that will suck the life from you!
http://gunz.ijji.com/
 
Jetz Rampage 4 - The Best in a long line of Jetz games. Bloody and fast paced!
http://www.caiman.us/scripts/fw/f2281.html
 
Knight Of Knights - A game with nice visuals, good controls, and lots of action.
http://www.armchairempire.com/free-games/knight-knights.htm
 
Kumoon - A fun puzzle/shooting game that incorparates physics.
http://mayoneez.1g.fi/kumoon/
 
Last Dimension - A futuristic shmup that plays a lot like Star Fox 64.
http://www.caiman.us/scripts/fw/f1440.html
 
Megabot - A Megaman style shooter with past-paced action!
http://www.caiman.us/scripts/fw/f287.html
 
Metroid Redemption - Another Metroid game that is sure to keep the boredom OUT!
http://gamemakergames.com/?a=view&id=80
 
Pogo Sticker - A fun physics platformer that should keep you amused for a while.
http://jet.ro/feats
 
Silver Knights - A fun mech fighting game.
http://www.megagames.com/news/html/freegames/silverknightsv005d.shtml
 
Slash The Building - A very addicting game with a stick person, a sword, and some building to slash.
http://www.acid-play.com/download/slash-the-building/
 
Triumph War! 2099 - A top-down shooter where you can give commands.
http://www.darksungames.com/gamedetail.cfm?title=TRIUMPH%21%20WAR%202099


Oh, yeah. I am the guy who accidentally supported a warez site on Tim's site. I didn't know at the time. I'm sorry and don't ban me please. I won't do it here.