Napoleon Total war has reasonable requirements, which is only to be expected considering it is built on Empire Total War's engine.

The biggest surprise is the 4GB RAM recommended requirement on Vista/7. God bless XP, how we miss your sleek ways

      Minimum:
          o OS:Microsoft® Windows Vista®/XP®/Windows® 7
          o Processor: 2.3 GHz CPU with SSE2
          o Memory: 1 GB RAM (XP), 2 GB RAM (Vista®/Windows® 7)
          o Graphics: 256 MB DirectX® 9.0c shader model 2b compatible GPU
          o DirectX®: DirectX® 9.0c
          o Hard Drive: 15 GB free space

      Recommended:
          o OS: Microsoft® Windows Vista®/XP®/Windows® 7
          o Processor: 2.6 GHz Dual Core CPU
          o Memory: 2 GB RAM (XP), 4 GB RAM (Vista®/Windows® 7)
          o Graphics: 256 MB DirectX® 9.0c shader model 3 compatible GPU
          o DirectX®: DirectX® 9.0c
          o Hard Drive: 15 GB free space