How to enable HD models

To enable them first pause and go to settings, go to video and you should see a box saying: Load HD content if available, tick the box and click apply to enable the HD models.

Simple version:

Pause > Settings > Video > Tick the box saying: Load HD content if available > Apply

Normal models are to the left, HD models are to the right.

Scientists:

Barney:

Thanks, i hope you enjoy Half-Life in stunning HD graphics.

If you comment i will likely not see it. (Notifications are annoying.)