this site has links to free games that don't require purchases, also has links to good sites for free games, and flash games!
This page is devoted to the BEST OF THE BEST (in my opinion)

Powder

this game's phisics realism and possiblilities make me open my mouth 20 feet long in awe of its massive realism,(my favorite part is burning stuff!) it makes me wish there were more dots allowed
to experience this wonder click here

Stick ranger

dan-ball has won another game in my heart, stick ranger, this rpg action game is quite enjoyable, play it here

America's Army 3

oh, I so love this fps (even though I die a lot) and I think that it deserved this page, but watch out! the graphics are high, and only fast computers are recommended! find it here

Boxhead-2play rooms

The boxhead series just got multiplayer!If you like explosions, zombies, guns, blood, and multiplayer action, this is the game for you! play boxhead-2play rooms here

ijji Games

ijji is a game making company, ALL OF THEIR GAMES ARE FREE, every single one I played, I loved so far.
I recommend the ijji Reactor. find it here
this site has links to free games that don't require purchases, also has links to good sites for free games, and flash games!