Infamy started as a free mod for Insurgency but it's gone commercial with Valve's support.
Along with several 32-player multiplayer modes about capturing and holding points in different ways, it has 8-player co-op missions about attacking, defending, and patrolling territory, and a touch of singleplayer too. It's not a serious sim but it's less arcade-y than many. Like DoD, Day of Infamy is a class-based first-person shooter about fairly close-range infantry combat across the fronts of World War 2. They're trying to pick up where Day of Defeat left off, basically. Infamy is the work of New World Interactive, the folks who made modern military FPS Insurgency. Now on Steam Early Access is Day of Infamy, a World War 2 multiplayer FPS heavily inspired by Day of Defeat - and made with Valve's blessings and support. Valve seemingly have little interest in making a new Day of Defeat but they are at least letting someone else have a crack.
