Reminds me of something I pulled playing Starfleet Battles, once - a game that if I have my way, I'll never play again, and, thanks to what I did, I doubt I'll be asked to by anybody I've gamed with before:
A group of us got together regularly to play 2nd Edition D&D, and I enjoyed the heck out of it. But one gameday I arrived at our gaming spot to find out that some people some of my fellow gamers had used to game with were in town, and the game they used to play was Starfleet Battles, and they wanted to play that. I did NOT want to play something non-roleplay, but I figured - my friends are here, its Star Trek, right?, so I'll give it a shot.
The scenario was three teams of three ships - Romulan, Klingon, and Federation, and a freighter in the middle of the play area containing a precious (unspecified) cargo we all wanted, and belonging to none of us. I was placed on the Federation team with one of the players I didn't know, and his teenage son, because he knew how to play and was going to teach me. His idea of "teach" was to tell me every move to make - effectively playing my ship with me as a proxy. When we entered the area, I asked if we should hail the other ships and attempt to negotiate, and whether we should see if we could render assistance to the freighter, and I was told no. Well, o..kay then.....
The guy and his son left the room for a break as all three groups were closing on the freighter. I "hailed" the Klingons, and informed them that I believed there was something seriously wrong with our fleet commander - possibly alien influence or something - because he was behaving both disHONORably and against the precepts of the Federation, and was about to get a lot of people killed unnecessarily. I basically negotiated a temporary alliance with them, agreeing that we would share the benefits of the cargo. I then "hailed" the Romulans, and told them I had made an alliance with the Klingons and it would be best if they played along and we'd cut them in, too. Or we'd cut them in two.

They agreed. I dropped my ship to the rear of our formation.
When they returned, we moved a bit closer in again, and then ALL of us opened fire on the son's ship, and crippled it. I then told the guy what had happened, and offered the chance to surrender to save his crew. He made us destroy him, instead. The truce held, the freighter was helped, while being "helped" with their cargo, and the game ended.
And, that, as they say, was that.
![Devious :] :]](http://www.enworld.org/forum/images/smilies/devious.png)