You try to get them alone, when you know one party is out, and just start to gently wear away at their trust, until they're a human shaped receptacle for suspicion, and before you know it you've got galactic civil war on your hands, and you can mop up the pieces. Because the fleets take hours, and sometimes days, to get from star to star, that leaves you with a good deal of time to play the diplomacy game, trying to cement alliances and crumble the foundations of those of your enemies. Up to eight players start with a few star systems, and then expand outwards, until they meet someone else, and either decide to not kill each other immediately, or have at it. Pick a game and play it online right now, with no download or sign-up. It's a real time strategy game in the same way that glaciers move in real time, set in space and all about galactic expansion. Play free online games that have elements from both the 2D and Shooter genres. If punching isn’t enough for you, you can grab power-ups that turn you into pumpkins or birds which lets you pull off surprise attacks, because what else are birds good for? Neptune's Pride is the epitome of backstabbing, two-faced, genuine human nastiness.