Well, aparently the specs have been raised:
OS: Windows Vista 64-bit or newer
Processor: Intel Core i3-2100T @ 2.50 GHz / AMD Phenom II X3 B73
Memory: 4 GB RAM
Graphics: ATI Radeon HD 4850 or NVIDIA GeForce 9600 GT
Hard Drive: 14 GB available space
Sound Card: DirectX Compatible Sound Card
I have a similar graphics card (ATI Radeon HD 5145) and 4GB RAM and I wonder if it's still worth giving it a try. Will there be more official information for those who don't meet the offical requirements? Because obviously I don't want to buy the game without knowing whether I can play it or not.