Why doesn't Monster Hunter Wilds bring back underwater combat? Former series producer reckons it's like making a whole extra game: "It's really, super hard"

gamesradar.com:

Ever since 2010's Monster Hunter 3 (Tri) and its Ultimate follow-up, a small but devoted group of series fans has been asking for a new installment to revive the underwater combat that helped define the odd third-gen entries. Monster Hunter World, arguably the most realistic game in the series to date, made no mention of it, and Monster Hunter Wilds basically looks like Monster Hunter World 2, again with no underwater combat in sight. The cynic in me wants to say that underwater combat just wasn't very fun, or was at least much weaker than normal combat, but former series producer Shintaro Kojima has a more sophisticated theory: "It's really, super hard" to make. 

Kojima was assistant producer on Monster Hunter Tri and had been on the series in some capacity since the original PS2 cult classic, ending his run with Monster Hunter Generations. As Automaton spotted, with underwater discourse resurfacing yet again in the lead-up to Monster Hunter Wilds, he discussed the challenges of recreating the fighting style, likening it to "making a separate game."

"If the game already has ground-based battles, then [adding underwater combat] is like making a separate game," he said in a tweet (translated by Automaton). "It’s difficult. It’s really super hard."

Underwater fights functioned a bit like the dramatic set piece encounters in World in the sense that they totally upended normal combat, but instead of gimmicks and tools they came with a whole new suite of movement and attack animations for your character. Moving, gathering, and especially fighting underwater looked and felt totally different, and even though there are only a few water fights relative to the whole monster roster of Tri, these sections had a big impact on the feel and flow of the game. 

Naturally, as Kojima says, this created a lot of extra work for the dev team. In a 2017 interview with GameSpot, OG Monster Hunter director Kaname Fujioka said the underwater sections were an immense challenge, and "for the