Modern-day military FPS Insurgency [official site] now has a World War 2 military FPS lurking inside it, like a matryoshka doll made from bullets. Insurgency developers New World Interactive built the foundations of mod Day of Infamy themselves but have opened it up to players to expand it. Yes, obviously it is inspired by Day of Defeat. Infamy required a beta client when it first launched in mid-January, but as of a few days ago it’s compatible with the game’s main branch for everyone to easily play.