The mod was developed by Breadman and has received overwhelmingly positive feedback since going live on Steam. Though strictly speaking it may not be a free-to-play game in its own right ...

And best of all, Valve has made Half-Life 2 (which now includes all the Episodes) totally free for the next three days. You ...

Gmod's spiritual sequel Sandbox finally has a Steam page, and it looks like the creation tool will launch with a hugely requested feature.