Yahoo estimates that around 400 titles will be available by the end of the year.

"In game advertising is a win-win for Yahoo! Games, our partners and our users," said Kyle Laughlin, head of games, Yahoo!. "Yahoo! Games will safely and simply monetize our games experience while providing the best and most popular games free to game enthusiasts."

The games will be featuring pre-, mid-, and post-roll advertisement, which will be delivered by Double Fusion and NeoEdge.

Thead-supported downloadable games on Yahoo! Games will be available from over 30 publishers, including Alawar Entertainment, Anarchy, Big Fish Games, eGames, Floodgate, Freeze Tag, FreshGames, Funkitron, Gogii Games, GameHouse, Gamemill Publishing, HipSoft, I-Play, iWin, Last Day of Work, Legacy Interactive, Ludia, MumboJumbo, pixelStorm, PlayFirst, Playrix Entertainment, PopCap, Reflexive Entertainment, Sandlot Games, Sugar Games, TellTale Games, TikGames, uclick, Worldwide Biggies and Zero G Games.