For Counter-Strike 1.5, __**please rename the folder to `cstrk15` before placing it in your Half-Life directory**__, otherwise it'll overwrite your Counter-Strike 1.6 folder.
:::
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Alternatively, here's
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# Pre-1.6 Counter-Strike versions supported in Half-Life Steam
This table is adapted from the [CounterStrike Betas repository on Github](https://github.com/Ch0wW/counterstrike-betas/).