acSteam is a program that is actually a cracked version of Steam, allowing you to download Steam games free from the actual Steam servers. PacSteam has all recent Steam gameas, such as Lost Planet, Call of Duty 4, all Half Lifes, Devil May Cry 3, Dawn of War 40,000, Doom 3 and Deus Ex.
Download Here: [You must be registered and logged in to see this link.]
Download Update Here: [You must be registered and logged in to see this link.]
For the update, just extract to the PacSteam directory.

THE NORMAL "Steam.exe" CAN ALSO BE USED, USE THIS IF THE CRACKED ONE DOES NOT WORK, IF IT SAYS THE SERVER IS TOO BUSY, DELETE THE "ClientRegistry.blob" AND TRY AGAIN.

All of the games may download, but some may fail, here is a list of games that have been downloaded successfully:

Arx Fatalis
AstroPop Deluxe
Bejeweled 2 Deluxe
Bejeweled Deluxe
Bookworm Adventure Deluxe
BigMoney Deluxe
Bookworm Deluxe
Chuzzle Deluxe
Codename Gordon
Condition Zero (Playable on "SteamBuster")
Counter-Strike
Counter-Strike: Source
Dark Messiah
Day of Defeat
Day of Defeat: Source
Deathmatch Classic
Defcon
Dynomite Deluxe
Eets
Feeding Frenzy 2 Deluxe
Gmod10
Half-Life
Half-Life 2
Half-Life 2: Deathmatch
Hammer Heads Deluxe
Heavy Weapon Deluxe
Iggle Pop Deluxe
Insaniquarium Deluxe
Opposing Force
Pizza Frenzy Deluxe
Poker Superstars II
Rag Doll Kung Fu
Red Orchestra: Ostfront
Ricochet
Ricochet: Lost Worlds
RoboBlitz
Rocket Mania Deluxe
Talismania Deluxe
Team Fortress Classic
Typer Shark Deluxe
Wik and the fable of souls
Zen of Sudoku
Zuma Deluxe

These are only game that have been downloaded successfully, it does not mean games not on the list will not download.

Tutorial:
This tute can help you in d trick.

Step 1:
Install PacSteam, it is simple, double-click the setup exe and extract the files of your choice.

Step 2:
After installing, goto the PacSteam Directory and click the "Inventory" exe.

Step 3:
After double-clicking it, a window will come up with a list of programs, click "Steam Buster" at the bottom.

Step 4:
In Steam Buster, click File -> Settings and goto General and check the "use Steam account box", after this, press "OK"

Step 5:
Next, in the PacSteam directory, double-click "Steam". After updating, it will ask for a username and password, create one of your choice, after you have done this, close Steam.

Step 6:
After closing Steam, double-click "SteamPatcher.exe", a little command window will appear, type "yes" or "y" for each question and press enter.

Step 7:
In the PacSteam directory, go into the "Patches" folder and look for "PacSteam Client CRACKED.exe", double-click it and you should get a normal Steam window popping up.

Step 8:
FINISHED.

Enjoy every Steam game on the market!
Enjoy Ha**ck*!ng.....