Infinity Blade 3 is free, and so are 7,600 beautiful assets from a mysterious spinoff

Chair Entertainment is celebrating five years of Infinity Blade by giving away the series' latest game and more than 7,600 game assets, many from a planned spinoff that never materialized.

Infinity Blade 3, 2013's entry in the still-beautiful series of mobile fighting games, is free through the iOS App Store. It's the first time that the game's price has vanished, and for zero dollars, downloaders will get the core game and its four expansions.

The celebration continues with an asset giveaway from Epic Games, Chair's parent company. It includes 7,600 pieces of art created for Infinity Blade: Dungeons, the canceled series spinoff. Here's what's included, according to a post on Epic's Unreal Engine blog:

Infinity Blade: Warriors includes loads of assets for crafting fierce heroes.

Infinity Blade: Adversaries has even more content for a making wide variety of rivals.

Infinity Blade: Effects gives you visual effects ranging from fire and smoke to lightning and magical reactions.

Infinity Blade: Grass Lands is the earthy citadel adorned with stone set pieces and beautiful props.

Infinity Blade: Ice Lands is the wintery fort set deep within a glacial enclave.

Infinity Blade: Fire Lands is the radiant castle interior laced with unforgiving paths, dramatic props and flowing lava.

Infinity Blade: Sounds includes thousands of raw audio files and sound cues.

Infinity Blade: Weapons presents a vast array of melee weaponry, including never-before-seen swords and axes and also a few Infinity Blade fan favorites.

Chair Entertainment co-founder and creative director Donald Mustard revealed Infinity Blade 3, which he called "the epic conclusion of the Infinity Blade trilogy," at a September 2013 Apple event. The original Infinity Blade, released in 2010, is available for $5.99. Its successor, Infinity Blade 2, sells for $6.99.

Announced in March 2012, Infinity Blade: Dungeons was to be a Diablo-like dungeon crawler. It was in development at Baltimore-based Impossible Studios, a company comprised of Big Huge Games' Rise of Nations strategy series and 38 Studios' Kingdoms of Amalur: Reckoning veterans. Both of those studios, founded by former Red Sox pitcher Curt Schilling, collapsed in early 2012.

At first, Impossible seemed like a phoenix rising from those failed studios' ashes, and Infinity Blade: Dungeons was planned for a 2013 release. Epic closed Impossible Studios in February 2013, however, and Mustard announced the game's cancellation in July 2013.

"When former members of Big Huge Games approached Epic last year, we saw the opportunity to help a great group of people while putting them to work on a project that needed a team," Epic founder Tim Sweeney wrote at the time. "It was a bold initiative and the Impossible folks made a gallant effort, but ultimately it wasn't working out for Epic."

Labeled as new on Unreal's website, the bulk of the free asset bundles contain art from that unfinished game.

"Most of the content comes from Infinity Blade: Dungeons, which we made here at Epic and chose not to release," Epic's post reads. "While it was a tough decision to make back then, the content is beautifully crafted, and we are happy for you to have it for free. Use it in any Unreal Engine 4 project, no strings attached. We succeed when you succeed."

Those who'd like to explore what remains of Infinity Blade: Dungeons will need Unreal Engine 4. Epic's development software is available as a free download, a pricing-free model that Sweeney announced in March.