Gamasutra's weekly column, "Saling The World", covers the top five sellers for every available platform in the United States, Japan, and Europe, providing an important update of sales patterns worldwide.

This week's charts, with data taken from May 22nd, 2008, see Wii Fit exhaust its initial shipment completely in its first week of release, while both the regular and limited editions of Age of Conan: Hyborian Adventures place among this week's top PC sellers. Data for "Saling The World" comes courtesy of the public sales information on Amazon.com, Amazon.co.uk, and Amazon.co.jp, with sales split out for each platform and territory, and pre-orders disregarded.

This results in a true sense of what games are selling worldwide on the real-time updated service, as follows:

Nintendo Wii
North America: 1. Mario Kart Wii (Nintendo), 2. Guitar Hero III: Legends of Rock Bundle (Activision), 3. Wii Fit (Nintendo), 4. Dance Dance Revolution Hottest Party (Konami), 5. Wii Play (Nintendo).

Japan: 1. Mario Kart Wii (Nintendo), 2. Wii Fit (Nintendo), 3. Link no Bowgun Training + Wii Zapper (Nintendo), 4. Totsugeki!! Famicom Wars VS (Nintendo), 5. Wii Sports (Nintendo).

UK: 1. Wii Fit (Nintendo), 2. Wii Play (Nintendo), 3. Mario Kart Wii (Nintendo), 4. Mario & Sonic at the Olympic Games (Sega), 5. Pro Evolution Soccer 2008 (Konami).

Nintendo's Wii Fit debuts in North America this week, placing third in overall weekly sales. Sales for the title would have likely been considerably stronger if greater initial supplies had been made available, but Amazon currently lists the title as being out of stock and only available for purchase from third-party sellers, many of whom demand aftermarket prices in excess of $150.

Wii Fit also struggles with supply issues in Europe, where aftermarket inflation and stock shortages continue to be a problem more than a month after the title's UK launch. Dance Dance Revolution Hottest Party returns to the U.S. top five after a one-day promotional sale price at Amazon, meanwhile, as Mario Kart Wii once again tops overall sales in Japan.


Xbox 360
North America: 1. Guitar Hero III: Legends of Rock Bundle (Activision), 2. Grand Theft Auto IV (Rockstar), 3. Rock Band Special Edition (EA Games), 4. Halo 3 (Microsoft), 5. Call of Duty 4: Modern Warfare (Activision).

Japan: 1. The Orange Box (EA Games), 2. BioShock (2K Games), 3. The Idolm@ster: Live for You! (Namco), 4. Strangehold (Success), 5. Call of Duty 4: Modern Warfare (Activision).

UK: 1. Grand Theft Auto IV (Rockstar), 2. Rock Band (EA Games), 3. Halo 3 (Microsoft), 4. Guitar Hero III: Legends of Rock Bundle (Activision), 5. The Orange Box (EA Games).

A day-long price drop at Amazon drives Guitar Hero III: Legends of Rock past Grand Theft Auto IV as this week's best-selling Xbox 360 title in North America. GTAIV is expected to reclaim its place atop the chart next week, however, as demand for Guitar Hero III will likely slack as soon as it returns to full retail price. Elsewhere, Rock Band finds chart popularity following its recent release in Europe, while the Japanese version of The Orange Box tops regional sales soon after its debut.


PlayStation 3
North America: 1. Guitar Hero III: Legends of Rock Bundle (Activision), 2. Grand Theft Auto IV (Rockstar), 3. SingStar Bundle (SCEA), 4. Haze (Ubisoft), 5. Gran Turismo 5 Prologue (SCEA).

Japan: 1. Senjou no Valkyria (Sega), 2. Senjou no Valkyria -- Limited Box (Sega), 3. Haze (Spike), 4. Call of Duty 4: Modern Warfare (Activision), 5. MotorStorm Complete (SCEI).

UK: 1. Grand Theft Auto IV (Rockstar), 2. Haze (Ubisoft), 3. Gran Turismo 5 Prologue (SCEE), 4. Assassin's Creed (Ubisoft), 5. Uncharted: Drake's Fortune (SCEE).

Guitar Hero III also tops this week's PlayStation 3 software sales charts in North America, with Grand Theft Auto IV trailing close behind. Haze and SingStar make strong showings this week as well, with both titles breaking into the top five in their first week of release.

It remains to be seen whether either title has what it takes to compete with big weekly sellers like Gran Turismo 5 Prologue, however, and both titles could face fierce competition over the next month from both long-standing chart regulars and upcoming releases. In Japan, meanwhile, Haze finds a warm reception that results in a third-place finish in this week's sales results, while the region-exclusive MotorStorm Complete takes fifth in its debut week.


PlayStation 2
North America: 1. Guitar Hero III: Legends of Rock Bundle (Activision), 2. Rock Band Special Edition (EA Games), 3. Metal Gear Solid: The Essential Collection (Konami), 4. Shin Megami Tensei: Persona 3 FES (Atlus), 5. God of War II (SCEA).

Japan: 1. KimiKiss -- ebKore+ (Enterbrain), 2. Princess Nightmare (Karin Entertainment), 3. 12Riven: The Psi-Climinal of Integral -- Soundtrack Edition (CyberFront), 4. Suzumiya Haruhi no Tomadoi -- Limited Edition (Banpresto), 5. Musou Orochi: Maou Sairin (Koei).

UK: 1. SingStar Summer Party (SCEE), 2. FIFA 08 (EA Sports), 3. Guitar Hero III: Legends of Rock Bundle (Activision), 4. Pro Evolution Soccer 2008 (Konami), 5. Iron Man (Sega).

Amazon's recent day-long rhythm games sale impacts North America's PlayStation 2 charts the greatest, with Guitar Hero III and Rock Band finishing as this week's biggest software sellers on the platform. Metal Gear Solid: The Essential Collection also sees a jump in popularity this week, pushing up past Shin Megami Tensei: Persona 3 FES as this week's third-best selling PS2 title.

In Japan, meanwhile, last week's sales leader Aoishiro falls out of the top five in favor of discounted older releases like KimiKiss and 12Riven, while this week's release of Princess Nightmare makes its chart debut at second place.


PC
North America: 1. Age of Conan: Hyborian Adventures (Eidos), 2. The Orange Box (EA Games), 3. Age of Conan: Hyborian Adventures -- Collector's Edition (Eidos), 4. Painkiller: Gold Edition (DreamCatcher), 5. BioShock (2K Games).

Japan: 1. Chaos;Head (Nitro Plus), 2. Clannad Full Voice (Key), 3. Final Fantasy XI: Vana'diel Collection (Square Enix), 4. Phantasy Star Universe: Illuminus no Yabou (Sega), 5. Call of Duty 4: Modern Warfare (Activision).

UK: 1. Age of Conan: Hyborian Adventures (Eidos), 2. World of Warcraft (Blizzard), 3. Football Manager 2008 (Sega), 4. The Sims 2 (EA Games), 5. World of Warcraft: The Burning Crusade (Blizzard).

Age of Conan: Hyborian Adventures debuts strong in North America and Europe this week, capturing both regions' top PC sales spots after spending only a few days on store shelves. Amazon also reports big preorder numbers for Mass Effect over the past week, however. Both titles are expected to wage a close battle for chart dominance upon Mass Effect's release next week. In the meantime, The Orange Box manages an impressive finish in this week's U.S. results, while a rereleased and discounted Painkiller: Gold Edition makes a return to the PC charts after a long absence.


Nintendo DS
North America: 1. New Super Mario Bros. (Nintendo), 2. Mario Kart DS (Nintendo), 3. Brain Age 2 (Nintendo), 4. Brain Age (Nintendo), 5. My Word Coach (Ubisoft).

Japan: 1. Hercules no Eikou: Tamashii no Shoumei (Nintendo), 2. DS Bimoji Training (Nintendo), 3. Luminous Arc 2: Will (Marvelous), 4. Hiiro no Kakera DS -- Limited Edition (Idea Factory), 5. Hiiro no Kakera DS (Idea Factory).

UK: 1. Dr. Kawashima's Brain Training (Nintendo), 2. 42 All-Time Classics (Nintendo), 3. Mario Kart DS (Nintendo), 4. New Super Mario Bros. (Nintendo), 5. Mario & Sonic at the Olympic Games (Sega).

As Square Enix's The World Ends With You remains in short supply in North America, Nintendo's Mario and Brain Age franchises continue to rule over regional sales in its absence. My Word Coach drop to fifth place after seeing a sales surge last week, while Nintendo's Crosswords DS finishes just outside the top five at sixth place. Elsewhere, Hercules no Eikou: Tamashii no Shoumei takes top honors in its first week on Japanese retail shelves, while European DS sales continue to be headed by Nintendo's Bran Training series.


PlayStation Portable
North America: 1. God of War: Chains of Olympus (SCEA), 2. Crisis Core: Final Fantasy VII (Square Enix), 3. Metal Gear Solid: Portable Ops (Konami), 4. Iron Man (Sega), 5. Grand Theft Auto: Liberty City Stories (Rockstar).

Japan: 1. Monster Hunter Portable 2nd G (Capcom), 2. Maplus Portable Navi 2 (Edia), 3. Nippon no Asoko de (SCEI), 4. Star Ocean: The Second Evolution (Square Enix), 5. Bleach: Heat the Soul 5 (SCEI).

UK: 1. Grand Theft Auto: Vice City Stories -- Platinum (Rockstar), 2. Pro Evolution Soccer 2008 (Konami), 3. God of War: Chains of Olympus (SCEA), 4. FIFA 08 (EA Sports), 5. Medal of Honor: Heroes 2 (EA Games).

After spending more than a month at second place in weekly North American PSP sales, God of War: Chains of Olympus finally triumphs over Crisis Core: Final Fantasy VII in sales this week to claim a first-place chart victory. Sega's Iron Man also makes an impression in this week's sales results, with the PSP edition of the title being the only version to place in the top five in North America's multiplatform charts.