The collaboration adds a Fall Guys-styled event in Final Fantasy 14, allowing players to take part in wacky high jinks to earn new cosmetics.
Amidst reports of Mediatonic being affected by Epic Games' mass layoffs, the company says work on Fall Guys is still a "priority".
Though the Epic Games-owned studio isn't closed, Bloomberg's Jason Schreier reports it was hit "very hard" with layoffs.
After reaching 20 million players in the first 48 hours, the battle royale party title continues to notch up impressive numbers.
Costumes based on Eivor and Odin from Assassin's Creed Valhalla are now available, as well as other cosmetics based on the series.
The battle royale game went free-to-play last week along with launching for the Epic Games Store, and also doubled its peak PC concurrent user count.
Mediatonic's battle royale title went free-to-play recently, and reaped the benefits with over 20 million players in its first two days.
Mediatonic's light-hearted multiplayer title also launches for Nintendo Switch, Xbox One, Xbox Series X/S and PS5 for the first time.
The party platformer goes free-to-play tomorrow for all platforms along with launching for Nintendo Switch, Xbox One, PS5 and Xbox Series X/S.
Between June 30 and July 4, Fall Guys: Spartan Showdown will bring Halo cosmetics to the battle royale title, including, of course, Master Chief himself.
Mediatonic says a stage builder is "under construction" for Fall Guys, though there's no word on when the feature will launch.
Mediatonic has revealed what frame rates and resolutions Fall Guys will target on Xbox One, Xbox One X, and Xbox Series X/S.
Mediatonic's battle royale game will only be available via Epic Games Store for new players, though existing Steam players will continue receiving updates.
New players will no longer be able to get the game via Steam, though existing players can continue to use the platform.
Those who've already purchased the game will get a free "Legacy Pack" containing several in-game items and a Season Pass.
More to be revealed at The Game Awards.
"Right now our real focus is on making the PlayStation and PC games as good as they possibly can be," says lead game designer Joe Walsh.
Fall Guys is going medieval with its second season.
The off-beat battle royale game continues to see great success.
