It seems Homefront: The Revolution is still coming to Linux, as it has recently popped up on SteamDB. I've spoken to the developer and publisher a few times, who repeatedly stated the Linux version was not cancelled, so it looks like it was being worked on.
Six hours ago from SteamDB:
223110/name: Lnx - Binaries
223111/name: Lnx - Engine
I was pretty excited about it before release, but the reviews really aren't all that good. I will do my usual thing and give it a properly honest look when it's available for us.
About the game
Homefront®: The Revolution is an open-world first person shooter where you must lead the Resistance movement in guerrilla warfare against a superior military force.
A living, breathing, open world responds to your actions - you and your Resistance Cell can inspire a rebellion on the streets and turn Occupation into Revolution, as oppressed civilians take up the fight.
But your enemy has the advantage - superior technology, firepower, heavy armour and air support. You must learn the art of guerrilla warfare – ambush, sabotage, infiltration, deception – and fight a running battle through the war-ravaged suburbs of Philadelphia.
And the single player campaign is just the start – in Co-Op you and your friends can form your own Resistance Cell and become renowned as Heroes of the Revolution.