There are several good options for free PC games but there are also many that will infect your computer with viruses I will give you some good sites. Steam while gives you options to buy lets you download a program that gives you access to many free games. Other games are downloaded individually form the parent site these should be relatively easy as long as you know what you are looking for.
try google
There are many places where one can go to find free downloadable PC games. Many gaming sites have an abundance of downloadable PC games. The Microsoft website also has many downloadable PC games.
The Aapeli website offers one the chance to play free games online. The website is in the Finnish language and one can play a number of free games on their tablet or PC.
The website MyPlay is well known for being an online collection of free downloadable PC games. These include puzzle games, word games, simulation games and games suitable for children.
http://www.exclusivewarez.info - you can download anything such as games, software, movies, shareware, PC psp nds wii games, themes, hacks, movies, music.
There are many places one can legally find free PC games. Many websites often offer free game downloads regularly. One such website is the Game Giveaway of the Day website.
PS2 games are not for the PC and are illegal to download
There are many places where one can good good PC games for free. One can find good PC games for free at popular on the web sources such as Addicting Games and OMG Pop.
Just go to www.funsplit.com, you can find many PC games here--full version and free....
Game.com
Companies like Gametop and myplaycity offer free versions of PC games. While I wouldn't advocate downloading games, you can play games for free on those sites.
You can download free PC games from the games official site. If the game is available to buy, you should not download it for free because it is illegal.