Bought this to play in Arma3
If they had sold this just as a Tactical WW2 Tank simulator while online play was still available they could have cleaned up. Its surprisingly good at that side of things. Built on the Arma2 engine, not a mod, and not to be confused with other Arma WW2 mods.
Recommended more for hardcore Arma fans than casual gamers though.
owners of Arma 3 can play Iron Front in Arma3 via play with six. That means multiplayer as well as better graphics, and its been made available for easy install in Six with the approval of the game devs and BI studios for existing owners of Iron Front.
Apart from that its basically Arma in WW2. The usual Arma controls we have all come to love and hate, the arma engine warts and all, clunky AI, but plenty of addons and user created missions and scenarios, and the familiar arma editor.
Note that there are "lite" (free, lowe res graphics) versions of Iron Front you can try before you buy
TL/DR: single player or LAN only - no multiplayer support. Other good Steam WW2 are availalable (R02, Rising Storm, etc). Very worthwhile to play in Arma3.