You probably already saw this Half-Life 2 and Hotline Miami mashup yesterday. If you have, just pretend you never saw this. Those who missed it, head below.
Dubbed Half-Line Miami, creator Thomas Kole said he made it as "a declaration of my love for these two games," and as an experiment in game design.
It features:8 thematic levels, one for every region in Half-Life 2; soundtrack by SUNG; level editor; a forum to upload maps and relentless gravity-gun fun.
Give it a go.