(Image credit: Night Street Games) Last Flag , the new multiplayer shooter from the studio founded by Imagine Dragons singer Dan Reynolds, released onto Steam earlier this month. While it's hard to glean precisely from the outside, the response to it seems to have been muted, despite developer Night Street games doing everything they could to raise its profile . The studio premiered Last Flag at Summer Game Fest, used Imagine Dragons' social channels to market it, and released it at a very reasonable price ($15/£12). It shows yet again how hard it is to stand out in Steam's crowded market. But Night Street isn't throwing in the towel yet. From now until the game's first update coming in the summer, Last Flag can be played for free all weekend, every weekend. Article continues below Last Flag | Graffiti Contestant Reveal - YouTube Watch On While I haven't had a chance to check out Last Flag for myself, it is by all accounts a great little multiplayer shooter.…