Hardware Requirements
Processor: Pentium 4 - 3.0 GHz, or AMD equivalentRAM: 1GB (1024 MB) Graphics Card: Shader Model 2.0 capable, ATI 9600, NVidia 6600 or better 780MB of free HD spaceGeneral rule: desktops about 2 years old or newer should run the game.

Software Requirements
TE120 requires the steam client to be installed with the Source SDK Base 2007 installed to run. To install the Source SDK Base 2007:

Go to your steam library.
Select tools from the menu right next to the search bar which defaults to “games”.
Scroll down to Source SDK Base 2007, right click and install.

Mod Installation

Close steam.
Download and run Setup_TE120.exe or Download the e120.zip file.
If you downloaded the zip file, unzip it in: ...Steamsteamappssourcemods
Open Steam, TE120 should now be listed in your Library under “Games”.