The earliest versions of Counter-Strike use an older version of the Half-Life SDK (as known as HLSDK 1.X) that are incompatible with the current releases of Half-Life, and thus require an older release of the game in order to play them.
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The earliest versions of Counter-Strike use an older version of the Half-Life SDK (known as HLSDK 1.X) that are incompatible with the current releases of Half-Life, thus requiring an older release of the game in order to play them.
:::info
**Currently, we do not host any Counter-Strike beta server**. This post here is only for preservation purposes.
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We are also using Half-Life version 1.0.1.6 as it is the latest version that supports the first version of the HLSDK before VALVe breaks compatibility with these older mods.
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We are also using Half-Life version 1.0.1.6 as it is the latest version that supports the first version of the HLSDK before VALVe breaks compatibility with these older mods. You can read their `liblist.gam` files to have an idea of what version of Half-Life 1 they were targeting.