Gamescom’s Opening Night Live showcase is always full of exciting new trailers and reveals, and one of this year’s surprises was Rainbow Six Tactics. Borrowing operators from Rainbow Six Siege, this new single-player adventure has players navigate a campaign of turn-based tactics gameplay, complete with all the gadgets and destructible environments you expect from the core games. Check the trailer out for yourself below.[TRAILER]Rainbow Six Tactics sends players on an operation to fight terrorists in missions all over the world.…