You hear about dedicated gamers breaking world records all the time when it comes to speed runs and marathon gaming sessions, but the games themselves also manage to make it into the Guinness Book of World Record as well. Today we celebrate them.

Final Fantasy XII - Longest Development Period My favorite entry in the Final Fantasy series had a tortured development that lasted five long years, making it the current holder of the longest period ever spent on a single game. The delay was so long and hard that it significantly hurt Square Enix financially, and director Yasumi Matsuno was forced to leave the game over it before completion. The optional superboss Yiazmat was named in his honor.

Fallout: New Vegas - Most Lines of Dialogue in a Single-Player RPG Voice acting in video games has become a tremendous achievement, but if you're going to really pull it off you have to have multiple lines for multiple scenarios and decisions. Fallout: New Vegas went way above the call of duty in that regard, recording 65,000 separates lines of dialogue.

Mafia II - Most Swearing in a Video Game We've come a long way from the days of Bionic Commando when the word damn was shocking. Now you can indulge almost any R-Rated content you like so long as it's labeled. Still, there's an upward limit right now to the amount of profanity most people would put in a game. 2K is not most people. At more than 200 f-bombs, Mafia II is officially the bluest game ever made, and puts it just under the movie Scarface in terms of fuck-usage.

Wii Sports - Best-Selling Video Game of All Time As of this year Wii Sports has sold more than 85 million copies, making it the best selling single game of all time. It took over the place from Super Mario Bros, though Mario is still easily the best-selling character of all time. Still, your grandma's favorite game is the winner.

Metal Gear Solid 4 - Longest Cutscene Sequence Depending on who you are cutscenes in video games are either the reason you fight so hard to win or a nuisance to be skipped at the first opportunity. No matter how much you might believe the former, however, Metal Gear Solid 4 is a little excessive. Four separate scenes in the game's finale add up to 71 minutes of non-play, and are longer than some theatrical films. The game also holds the record for longest single cutscene at 27 minutes.

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Grand Theft Auto V - Fastest Game to Gross $1 Billion I don't really get the deal with GTA myself, but there's no arguing it's popular. The latest entry took just three days to break $1 billion in sales, beating out even films like The Avengers.

Entropia Universe - First Game to be a Recognized as a Bank Anyone that plays MMORPGs knows that in-game currency is serious business. It's traded, legally and illegally, for real world money all the time, but only one game in the world has actually gone the route of setting itself up as a legitimate financial institution. That's Entropia Universe, a Swedish MMORPG that petitioned the Swedish Financial Supervisory Authority for a license, which was approved. Project Entropia Dollars (PED) are openly traded on the stock exchange.

World of Warcraft - Most Popular MMORPG By Subscribers Speaking of MMORPGs, the undisputed king of them when it comes to subscribers is World of Warcraft. With over 10 million subscribers around the world, there are more people in Azeroth than there are in Tokyo. It's also the highest grossing video game of all time, topping $10 billion in sales.

Tomb Raider - Best-Selling Gaming Heroine You might have thought the honor would belong to Samus Aran, but you'd be wrong. With more than 35 million titles sold since 1996 Lara Croft is the woman who has moved more games than any other solo female lead. Considering the excellence of her last outing, I'm sure she'll hold into that title for quite a while.

Legend of Zelda: The Ocarina of Time - Highest Ranked Title Ever You can argue all you want over what video game is truly the best ever, but when it comes to critical acclaim the argument has been tabled since 2008. Ocarina of Time, in addition to basically inventing modern adventure gaming, holds the record for highest consistently rated title ever. Even on Amazon the few 1-star reviews (13 among over 1,000) are obviously trolls looking to pick fights. Simply put, everyone that has ever played this game loved it with all their heart, and Guinness recognizes that fact.