Social games company Zynga is releasing 10 new products including a bingo game and a lineup of casino-themed games, its chief executive Mark Pincus said on Tuesday.

The company, which makes FarmVille and CityVille, draws most of its users from Facebook and makes money from selling virtual goods such as costumes and weapons that people use to play the online games.

It filed for an initial public offering of up to $1 billion in July. Difficult market conditions spurred by the weak economy have forced Zynga to delay the IPO, according to media reports.

Pincus introduced several new games at the company's headquarters such as CastleVille and Hidden Chronicles, in which players must find hidden objects.

Zynga's new franchise, Zynga Casino, includes its Poker game and a bingo game.

Zynga has been increasingly challenged by other video game companies such as Electronic Arts, which are starting to attack its gaming turf on Facebook.

(Reporting by Alexei Oreskovic in San Francisco and Liana B. Baker in New York)