Overwolf is overlay software created and published by Overwolf Ltd. It is specifically designed to seamlessly integrate third-party apps into games to extend their functionality.
The main use of Overwolf apps is to enable the simultaneous use of third-party software without having to leave the game screen. Some examples are surfing the Internet or Facebook, talking on Skype or streaming gameplay to Twitch. Overwolf apps are downloaded through the Overwolf Appstore. The default button combination to bring up the Overwolf overlay while in a game is to hold the Shift key along with F1 and F2.
As of 2014, Overwolf is only available for computers and tablets running Windows 7, Vista or XP. Basic system requirements are 50 megabytes of free hard drive space, DirectX9 or DirectX11 and Microsoft .Net 3.5 SP1 installed. The designers claim that no extra RAM should be necessary to run a game with Overwolf enabled.
As of 2014 the list of supported games is fairly long. Some prominent examples are Minecraft, Max Payne 3, Sonic the Hedgehog 4, The Walking Dead, Call of Duty: Black Ops II, Dark Souls and Super Street Fighter IV. Overwolf is available in 10 languages including English, Spanish, Korean and Russian.