Players using Zynga's main portal can use bitcoins for seven games.
The technology is designed to bring digital currency to the masses.
Recent regulatory developments could slow the pace of investments in 2014, one expert said.
Bitcoin's sharp rise in value this year has many questioning whether the virtual currency is sustainable in the long term.
China has been clamping down on the currency, and has banned banks from trading with it
How much is Evan Williams worth? What percentage of YouTube traffic is mobile? It's all right here
Arbor Networks says the application being advertised in spam messages contains a remote access Trojan.
A flaw in Nvidia Mental Ray software can be exploited to compromise server clusters used for 3D rendering, researchers from ReVuln said.
Security and flexibility are among several big challenges for wider adoption of the virtual currencies, experts say.
The Bitcoin has been growing in popularity in China as a new kind of investment.