The minimum requirement is purely from a technical point of view, as in there is a minimal set of hardware/software on which the game will run without serious errors. "Recommended" is more subjective, we should base it on the ability to run with decent frame rate, with all graphics settings enabled (no AIs since they can cause problems even on high end systems). We should break them both down by OS, since OS X users seem to think in terms of Mac version; whereas Windows and Linux users think more in terms of processor speed, RAM, video card, etc. Just to start things off, minimum requirements: Windows Version: 2000 Processor: 1 GHz Intel or x86 compatible (I think 1 GHz is a decent cutoff without getting into specific processor types) Memory: 512 MB Graphics: card supporting OpenGL 1.3 w/ 3D hardware accelerated drivers and at least 128 MB memory; Radeon 9000, GeForce 3, or similar* Screen resolution: 1024x768 OS X Version: 10.5 2006 or later Intel-based Mac (http://en.wikipedia...._by_CPU_type#P6) Screen resolution: 1024x768 Linux Processor: 1 GHz Intel or x86 compatible Memory: 512 MB Graphics: card supporting OpenGL 1.3 w/ 3D hardware accelerated drivers and at least 128 MB memory; Radeon 9000, GeForce 3, or similar* Screen resolution: 1024x768 * We can probably make a list of known graphics cards that don't work. Intel is not recommended, at least pre-Intel HD 3000, due to buggy drivers and terrible performance. Certain other brands are problematic.