Infinity Blade III players can work together and earn a special-edition digital samurai sword from 47 Ronin in an in-game event later this month.
ChAIR and Epic Games announced the promotion Monday. Starting Friday through Dec. 24, players team up in a ClashMob to defeat 47 Ronin's Samurai Brute.
See also: Infinity Blade: How Two Brothers Made $20 Million From One Mobile Game
If enough Infinity Blade III players participate and succeed, all players will receive the Brute's sword, which will be added to their in-game weapons.
Infinity Blade III was released in September for iOS devices. The hack-and-slash game was used on stage by Apple to show off the power of the iPhone 5's 64-bit chipset. The game costs $6.99 [iTunes link], and the 47 Ronin ClashMob is available for free to all players who have updated to the "Soul Hunter" version.
47 Ronin, starring Keanu Reeves as a samurai seeking revenge for his master's murder, arrives in theaters on Dec. 25.
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BONUS: 10 Most Beautiful Mobile Games
You know that nightmare where you're running through the woods, being chased by some unseen terror? That's pretty much Dead Runner. The hauntingly beautiful landscape provides the perfect backdrop.
Price: $0.99 for iOS and Android.
Meet Quozzle, an incredipede -- basically an eyeball that can grow various forms of limbs -- who's on a quest to save her sisters. While the premise is bizarre, the illustrations are beautiful. Inspired by medieval woodcuts and 1700s botany texts from the Age of Discovery, the game is so beautiful it'll be hard to tear your eyes away.
Price: $3.99 for iOS and Android.
Another console game-turned-mobile, Limbo has long been hailed as a gaming work of art, and pioneered the popular style of black silhouettes with light or colored backgrounds. The game is at the same time creepy and beautiful, with unexpected enemies lurking around every corner, waiting to bring about gruesome deaths.
Price: $4.99 for iOS.
Machinarium is a point-and-click adventure game that follows an exiled robot named Josef, who is attempting to return to the city of Machinarium to rescue his robot beloved (who was kidnapped by a mafia-esque organization called the Black Cap Brotherhood). To do so, Josef has to solve a series of puzzles. But the real beauty of the game is the detail in the hand-drawn illustrations.
Price: $4.99 for iOS and $5 for Android
Reminiscent of Limbo, this physics-based game shows the landscape as a black silhouette against a stunning panorama of the night sky.
Price: $0.99 for iOS and $4.99 for Android.
The premise of Osmos is simple: You're a galactic mote. Eat smaller organisms to grow and thrive, and watch out for larger organisms that are trying to eat you. What makes this game special is the beautiful colors.
Price: $0.99 for iOS and $2.99 for Android.
A pixelated world sounds like a gaming nightmare, but Sword and Sorcery masterfully sets this heroic fantasy in a beautifully antiquated world.
Price: $4.99 for iOS and Android.
Based on the graphic novels that inspired the record-breaking television series, The Walking Dead surrounds a new group of characters in the same zombie-infested world. While the game is already unique for its focus on story and characterization rather than puzzles and shooting, the comic-like illustrations pay homage to the series' roots in a gorgeous way.
Price: Free to download for iOS; each episode is $4.99.
This physics-based construction game is as addictive as it is beautifully simple. Create structures by connecting balls of goo to get you from point A to point B.
Price: $4.99 for iOS and $2.99 for Android.
This Swedish game, which is based on an old man's walk though the woods to search for omens for the coming year, is one of the most creatively original games we've played on mobile. Year Walk may be a little trippy, and it may freak us out just a tad, and we may not even fully understand it, but boy, is it friggin' pretty.
Price: $3 for iOS.
Image: chAIR/Epic Games