With each successive round of gaming consoles, developers get a little more inventive with the available technology -- the same goes for how they tease their audience ahead of a game's launch, too. Turtle Rock Studios (the team behind Left 4 Dead) recently released an interactive trailer for its upcoming co-op shooter, Evolve. The clip follows a session of four players as they stalk and then battle the gigantic, player-controlled creature that's out to end them. The rub of it is that with a single mouse-click you can swap between the perspectives of each combatant on-the-fly, and watch how the game unfolds from their respective points of view. Want jump from bipedal-monstrosity to soldier and back again just before the former attacks the latter? Go for it.