Half-Life Miami really is exactly what it sounds like: a mash-up of Half-Life and Hotline Miami. It's a fast-ish top-down shooter, but with Half-Life locations and, of course, the gravity gun. Oh, but unlike both of those games, it's free. Otherwise, it'd be a one-way train ride to Lawsuit City 17.
Here's what it looks like:
It's got eight levels, one for every major region in Half-Life 2. There's also a level editor, so people can contribute their own creations. Next step: Hotline-Miami-fied versions of Counter-Strike and Team Fortress 2 (I wish).
Half-Life Miami isn't quite as silky smooth as Hotline Miami — nor is it as detailed and riveting as Half-Life 2 — but it's a Combine-crushing good time. I just got done trying to beat a level by bludgeoning everyone to death with a medkit because, you know, irony. And hey, it's more Half-Life, which is nice given that SOMEBODY WHOSE NAME RHYMES WITH 'VALVE WILL NEVER MAKE HALF-LIFE 3' has apparently decided to never make Half-Life 3. Check it out here.