2) Update your game to version 1.1.1.0 (the last update before VALVe moved to their STEAM interface)
3) Download the releases of Counter-Strike you desire below inside the root folder of Half-Life.
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4) If you did it right, you should see mods in the `Custom game` category within the Half-Life 1 menu.
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Alternatively, you can download this archive on [MEGA](#) which contains Half-Life 1 already patched to version 1.1.1.0 as well as containing all major builds of Counter-Strike (Beta 6.6, 7.1, Retail 1.0, Retail 1.1, Retail 1.3, Retail 1.5).
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# Versions of Counter-Strike's betas supported in HL 1.1.1.0
This table is adapted from the [CounterStrike Betas repository on Github](https://github.com/Ch0wW/counterstrike-betas/).