Wizards vs Muggles, referred to in its discussion thread as Tom Clancy's Harry Potter and the Muggle War (which should give you a rough idea of the style), is an ongoing forum RP hosted on the TV Tropes fora, started by Hungry Joe and currently GMed by Sabre's Edge. Set Twenty Minutes into the Future in the Harry Potter continuity, it features the breaking of the Masquerade and the global war that follows, as well as two paramilitary teams on either side that struggle to survive. As if that weren't enough, mysterious creatures start showing up as part of its crossover with Kingdom Hearts: Twilight of the Stars, adding a whole new dimension to the conflict.On the Muggle side, Team Unicorn is formed as a joint US/UK mini-special forces group, much like its older sister Rainbow; on the wizard side, a yet-unnamed paramilitary wizard team has been hastily conscripted for special missions. Though they are different sides of the war, the two teams will discover that they might have more in common than they thought...Events so far:
King's Cross: the hastily-assembled wizard team must escort the students through wartime London to King's Cross, but when things go horribly wrong, the station becomes the backdrop for a hostage situation. Unicorn is called in to help.
Schrodinger's Box: two weeks after the King's Cross debacle, the wizarding team is sent on an "easy mission", helping the Malfoys move a mysterious artifact to safety. Marks the beginning of the crossover campaign.
Drear Island: concurrent to the above mission, the commandos find a routine transfer disrupted by an unexplained loss of navigation ove the North Sea and the sudden appearance of islands that weren't there before.
Station Chiefs: the Romanian missions. A cloak-and-dagger meeting between representatives of both factions in Bucharest is interrupted by a kidnapping orchestrated by an unknown third party. Enemy Mine ensues. Also sees the first use of GM maps in combat.
Storming the Castle: the first all-out battle: with the Heartless threat in the open, the first big battle sequence takes place: about a platoon's worth of PCs and a Russian motor-rifle company versus Heartless.
Diplomacy and Mediation: Lita goes over to the commandos' place to talk peace with Mr. Clark, and does an old acquaintance a favor; kicking a hornet's nest in the process and starting the discovery of a conspiracy, as Charmdrummer becomes suspicious of his own memories' validity. Mr. Krum, former Quidditch star, makes a cameo. New team members appear in both groups.
McMurdosford: The commandos meet a mob of angry townspeople and things start to go down from there; meanwhile, the wizard group starts its own investigations into something that happened in 1980, nearly forty years back.
US Mission: The comandos go in a trip to Massachusetts because [Classified] when [Classified] causes [Classified] to [Classified].
Spain Mission: Karla and Lita go to Spain because [Classified], meanwhile Clark and Olivia go to Spain because [Classified] buildings [Classified] disappearing policemen thanks to [Classified].
The signup is here; the RP is here; discussion, here. The interlude can be found here.
Subverted in the Romanian roadside ambush. The PCs had a Russian Mi-28 to help them out, but poor radio communications and poor communications meant that it was never informed of the Romanian flak vehicle. It was consequently shot down.
Black Helicopter: to some extent. Though helicopter rides for the commandos are common, they are mostly ordinary military or police helicopters. The one time Stealth Hawks appeared, it was in a training mission; they were taken away before they could be deployed in earnest.
Gambit Pileup: Romania. There are four factions there already before the crossover elements and the players arrive.
Grey and Gray Morality: Word of God confirms that the campaign is going to try to go this way, as both the Muggle countries and the Wizarding Ministries of Magic resort to more and more cynical methods to achieve victory.
Gun Porn: the Unicorn players are usually quite specific about their weapon types and specifications. It helps that that the GM is a military buff.
Multinational Team: both Unicorn/Occulus and the wizard group include members from multiple countries, although both are British-commanded. The Sunshine NPC faction appears to be under more of an independent command, not quite to N.G.O. Superpower level, but enough to have chartered a merchant ship and to own several helicopters.
Nerf: by common consent, transfiguration was toned down so that a wizard cannot, for example, transfigure a rock into a chunk of antimatter.
Noodle Incident: Arguably, most of Lita's school life is this. It's been revealed that:
Lita's spent hours inside a hat, with a turkey.
She did a fiendfyre when she was 13, setting the then-headmaster's robes on fire.
She was pretty bad in practical potions while being good in the theory part, and one of those potions may have eaten the cauldron that was holding it. However, "pretty bad" shows as "Exceeds Expectations", and is The B Grade for her.
She got detentions very often despite having been a great student in-class because of things she did out of class.
Most of the details are currently classified.
Poor Communication Kills: as in war, failure to disseminate information can result in problems. For instance, not taking terrain into account when using radios in the mountains.
Peace Conference: Both Clark and Lita are hoping/planning to get this going to avoid too much bloodshed.
Retcon: several were needed to make the RP playable, from fanon adjustments via Rule Zero to the wizards' power (transfiguration in particular was toned down lest somebody summon up a chunk of antimatter); most importantly, the Death Eaters were implied to have gained an ideological foothold that the Order of the Phoenix was unable to eradicate.
Super Registration Act: One of the two major viewpoints on what to do with the wizards should the muggles win.
The Spymaster: Karla for Wizard intelligence, Ritter for the commandos. Sergey works for the Russians. Hermione fulfills this role for another department in the Ministry of Magic, while Word of GM has admitted extreme interest in Dumbledore's role as a spymaster—and Harry's role as his protege.
Teens Are Short: Played straight with Lita, who is shorter than all the commandos, Chess, Jay, Jamie, and Karla, and Charmdrummer, and Neville, and his wife...and Hermione... and the Malfoys...
Webcomic Time: The events in Romania, starting with an infiltration into a police station and ending with the final extraction, canonically took less than twelve hours total. But since it encompassed at least three separate action sequences (including the Storming the Castle scene, which had to be coordinated with actual maps and a company-sized Motor-Rifle group), lots of intrigue, and the crossover event to boot — it spanned approximately five months' worth of roleplaying. Whew.