On the topic of the ''SuperSmashBros'' example--yes, complete with the sudden alliances. In ''Brawl'', during a particularly long gaming session at a convention, anyone who picked certain characters over and over was going to be ganged up on. Later, once the tournament began, the very first fight ended up on the retro stage, Jungle Japes from ''Melee''. Three of the four fighters immediately went after one another, while one person, who had chosen Pikachu, just stood on one of the side platforms and performed Thunder every time anyone else got near the platform. Guess who ended up finishing in fourth in that match. Cheap techniques earn you enemies ''really'' quickly.

This troper had a similar experience to that when he played a game of SSBB against 2 of his friends; except, because of a rule one of his friends forced onto the rest of us, every match in a 3-way free-for-all wound up becoming a 1-on-1 match with an extra character standing off to the side doing nothing. Literally 100% of the time, I was stuck as the extra character (By will of the one who created this rule), who had to wait for one of the "main characters" to be defeated before I can do anything; anytime I tried to do anything other than standing out of their way, the other two of them would drop what they are doing, team up, and defeat me with little effort.

Whenever this troper goes LARPing, many of the fights turn into this.

This troper's fencing club occasionally plays games of house-ruled Capture the Flag, since everything's better with swords. Needless to say, ganging up on one opponent happens fairly often.

Oh god, you HAVE to try this with Yu-Gi-Oh.Teaming up to beat the tough guy,then stabbing them in the back and taking them out in one shot.Nice...

This Troper had observed this in one Warhammer4000 game. He was playing Tyranids while his two friends were playing Chaos Marines and Orks respectively. The Troper captured all but one of the objectives. The two allied against me, but as I was fending off the Chaos Marines, the Orks suddenly attacked the Chaos Marines' flank. I then gleefully watched the fireworks.

This troper and her three sisters once deliberately set one up. We had three swords, and the three who had the swords would duel each other (alliances not allowed). When one of us was killed, she handed her sword off to the fourth sister, and the fight actually went on for some time.

Despite being an adult, this troper still engages in pool noodle sword fights with her father and brother from time to time.

I ''caused'' this in a Warhammer40000 game with my friends once. We went with an alliance-style match: One side had the Imperial Guardsmen, the Sisters of Battle and three Space Marine Chapters (Ultramarines, Blood Ravens, Grey Knights). The other side had Orks, Chaos Marines and the Dark Eldar. Finally, to keep things interesting, as the Eldar, I was the one neutral faction that served as an x-factor. We came up with a few good tactics to kepe things orderly while we fought:

The Orks were the main attack force (naturally), meant to keep their opponents busy by overwhelming them with numbers, while the Chaos Marines and Dark Eldar served as the heavy hitters, dealing critical blows to their opponents to drive them off. The Guardsmen were the main line of defense, the Battle Sisters were the main assault force, and the Space Marines were the heavies. I had my special units cloak to could pick off entire companies one at a time, while remaining cloaked; when the Orks were heading out for the attack, I sent out my regular footsoldiers to take on their Warboss, then called for a retreat, sending out my assassins to take him out for good once he was just about to die. The Orks went into a panicked prenzy; with such a blow to the Ork units' morale, they attacked the Dark Eldar, Chaos Space Marines and ''each other''. Once the Orks started rampaging, I unwittingly pinned the Chaos Marines and Dark Eldar against one another as well, and let the three-way face-off continue uninterrupted. Then I assassinated a Commissar nearby the Battle Sisters; the Battle Sisters fought off both the Guardsmen and the Space Marines, eradicating much of the former before getting wiped out themselves. By then, the Orks were wiped out, while the Chaos and Dark Eldar licked their wounds and retreated. While the Blood Ravens went after Chaos and the Ultramarines went against the Dark Eldar, I attacked a Commissar and a Chaplain at the same time, luring them to a narrow part of the battle map so I could assassinate them both, and making it appear as if the Commissar and Chaplain killed one another. This was where I was randomly attacked by Necrons and Tyranids; they wiped everyone else out, then went against each other. MindScrew.