I got it for the low, low
A new fan made game that mashes up Half-Life and Hotline Miami is coming soon for the low, low price of free. Developer Thomas Kole has built Half-Line Miamion a custom engine from the ground up. From the looks of it the gravity gun is the one and only gun available. The game will be released free with a level creator soon.
For now check out more information and screenshots over at the game’s IndieDB page.