It's about $20 or €14,39. It's a singleplayer game but it's cheap and looks to have great gameplay.
Very low system requirements, possible to play on Netbooks f.e.
o OS: Windows 2000 or later
o Processor: x86-compatible 800MHz processor
o Memory: 512MB
o Graphics: DirectX-compatible 3D graphics with at least 64MB of addressable memory (such as an ATI Radeon 7200, NVIDIA GeForce 2, or Intel GMA 950)
o DirectX®: 9.0c
o Hard Drive: 400MB
Some gameplay movies;