In order to make sure you have the right tools to play the game, here are the minimum and recommended system requirements for Riders of Icarus.
MINIMUM SYSTEM REQUIREMENTS
OS: Windows Vista (SP2)
Processor: Intel Core i3-2120 @ 3.3GHz or higher / AMD A8-5500 @ 3.3GHz or higher
Memory: At least 4 GB RAM
Graphics: GeForce GTX 260 (1GB) or better / Radeon HD 7670 (1GB) or better
DirectX: Version 9.0c or higher
Network: Broadband Internet connection
Hard Drive: At least 30 GB of free space
Sound Card: 16-bit Sound Card
RECOMMENDED SYSTEM REQUIREMENTS
OS: Windows 7 (SP1) or later
Processor: Intel Core i5-2500K @ 3.3GHz or higher / AMD FX-6200 @ 3.3GHz or higher
Memory: At least 4 GB RAM
Graphics: GeForce GTX 460 (1GB) or better / Radeon HD 6870 (1GB) or better
DirectX: Version 9.0c or higher
Network: Broadband Internet connection
Hard Drive: At least 30 GB of free space
Sound Card: 16-bit Sound Card
Please note that if you do not meet the minimum system requirements we are unable to guarantee that customer support will be able to assist with resolving any technical issues you may encounter.
NOTE: information was taken directly from http://forums.icarus.nexon.net/discussion/4995/riders-of-icarus-final-system-requirements and untill it is officialy updated by official sources