You’ll find a growing catalog of terrific Android Wear apps in Google Play, but with a little bit of tinkering, you can get even greater ones from other sources.

Check out the video below in which YouTuber Dave Bennett shows off the original Half Life on an LG G Watch.

Bennett uses the SDLash app, which emulates the GoldSource game engine and allows you to run classic Valve games on Android. This isn’t just a demo, then — it’s the full Half Life game in all its glory, running on a device that’s small enough to wear on your wrist.

It does come with several downsides, of course, like having to use a Bluetooth speaker for sound, and controls so small you won’t actually be able to use them. Nevertheless, the ability to run a game like this on an Android Wear watch is pretty incredible, don’t you think?

• SourceDave Bennett