System Requirements
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Software
Black Mesa will require any Source powered game to run. As long as the game comes with the Shared Resources, you will be able to run Black Mesa. To see if you can run Black Mesa, open Steam and look in the tools tab. If you see an entry titled Source SDK Base 2007, you can run Black Mesa.
Please note that neither the Nvidia or ATI free game packages come with the SDK base. You need to buy a Source powered game.
If "Source SDK Base 2007" Does not appear on the tools tab in steam you must purchase a game from this list.
At the moment, Black Mesa only supports the Microsoft Windows NT-based Operating Systems that Steam supports (2000, XP, Vista, 7). [1]
Installations
If you meet the Software requirements, you technically do not need anything installed. If you do not have the Source SDK Base installed however, upon running Black Mesa you will be prompted by Steam and asked to download it.
Hardware
If your computer can run any of the Orange Box games:
- Half-Life 2: Episode 2
- Team Fortress 2
- Portal
It should be able to run Black Mesa. However, if your computer struggles to run those games, it may not be able to run Black Mesa very well. [2]
Orange Box Recommended System Requirements
- Processor: 2.4 GHz
- RAM: 512 MB
- Graphics Card: DirectX 9 capable graphics card with 256 MB VRAM
(Above requirements are based on the recommended for Team Fortress 2, minimum specs probably won't work very well with Black Mesa)
Orange Box Ideal System Requirements [3]
- Processor: 3.4 GHz
- RAM: 1 GB (1024 MB)
- Graphics Card: Radeon X800 or Geforce 6800 or higher.
(The above specifications are based on ideal requirements for Team Fortress 2)

