Just the second game - and first fully internal one - to run on the console-standard engine.
Japanese download cards for PIkmin 4 have appeared in the wild, and in addition to new screens is some new information on next month's release.
An image on the back of the card (as shown in a post from Twitter user @Genki_JPN embedded below) shows an Unreal Engine logo among the other copyright information. Although Unreal Engine 4 is frequently used by 3rd party Switch publishers, Pikmin 4 would be the first UE4 game published by Nintendo since Yoshi's Crafted World in 2019 - a project whose development was predominantly handled by Good Feel Inc.
Also confirmed to be made in Unreal Engine!
— Genki✨ (@Genki_JPN) June 20, 2023
Here is the front and the DL card inside. pic.twitter.com/WAQY6LoHol
