Hl2 beta entities

[sopaconondas]

Hi, I would like to know if there is a way to have the hl2 beta entities with the hl2 final version entities in the same project (and that they work correctly). And if so, how is it done?
Best regards

[DaliVinci]

You can try using Coterminus. Base of a lot of Beta related maps, has a lot of useful stuff. Basically does what you said, Beta entities but in retail.