Differences from previous iterations in the series are that Lara's environment will be an "interactive world that reacts and remembers", such that footprints left in the mud or mud transferred to Lara's knee from kneeling on the ground will be washed away by rain, the bodies of the foes she encounters will remain where she killed them, and any destruction to the environment she causes will be permanent.
Lara Croft will be searching for Thor's hammer, and she first finds evidence of its existence in ruins beneath the Mediterranean Sea.
PC System Analysis For Tomb Raider: Underworld Requirements
Your PC will need a graphics card thats as powerful as a GeForce 7900 GTO/Radeon X800 XL and it should be paired with either a Athlon 64 X2 Dual Core 4400+/Core 2 Duo E4500 2.2GHz CPU to match the Tomb Raider: Underworld recommended system specs. This PC setup will deliver 60 Frames Per Second on High graphics settings on 1080p monitor resolution. System memory required for Tomb Raider: Underworld is 2 GB performance memory. You should also have 1 GB system memory for min specs. Another thing to consider is the DirectX capability of your GPU. Tomb Raider: Underworld needs a GPU capable of running DirectX 9. Recommended needs around a 13 year old PC to run.