i don't think it'll challenge my 2 year old pc one bit.
big budget mainstreamed games like this tend to be very well optimized, unless you're the epitome of ineptitude(ea games), and the gameplay is very simple: go from point a to be, trigger scripts, press button to activate lara croft going hysterical over kiling someone in self defense, etc...of course she goes on to become a mass murderer with no further incident.
it's the scripted, "cinematic" approach, hide the lack of gameplay with lots of camera angle changes, heavy breathing, needless hysteria, and quick time events to trick the player into believing something interesting is happening.