Resident Evil: Requiem is a video game where you Requiem some Residents of Evil.

In all seriousness, Resident Evil 9: Resident Evil: Requiem is a once in decade kind of experience. This game blends the survival horror aspects of 7 and 8 with the faster paced action of the RE: Remakes into one cohesive package. The blend between these two could have royally been messed up if done incorrectly. Ever since the blunder that is 6, Capcom never makes the same mistake twice and has learned that doing their homework, taking their time, and crafting masterpieces of iteration are what innovates the industry and keeps fans getting more than what they expected.
The Grace sections are phenomenal in how giving the player tools makes Grace a more competent survivor and the player better at the systems it asks of them. The performance from the VA of Grace genuinely feels like she is terrified at the start of the game then turns into a capable survivor which should be nominated for the best VA, hands down. The way the game paces itself out during her sections keeps the players on their toes the entire time while giving them room to make mistakes.
In contrast, Leon's sections are a power fantasy but do not overly make him feel overpowered. The player still needs to respect the mechanics and stay on top of things to mitigate needless use of resources. Leon and his sense of humor and the way he carries himself is at full display here and what is to be expected for him as he has aged. I genuinely feel that older Leon has enough world wisdom to make him feel like a grizzled veteran, while still having his quips and one-liners that are at the forefront of her personality. Every playthrough I have done I find myself saying his quotes while he says them. I feel that this is the best incarnation of Leon and his gameplay is so satisfying for those familiar with the newer RE: Remake styles.
The story of this game feels like a come to terms for the Umbrella storyline and the overarching Spencer narrative that the series has been building upon. However, it leaves room for more nefarious actors and more to be built upon to fill the void from the Spencer legacy. I am very interested to see where this goes and what DLC they come out for this game to further expand upon things.
My only real negative is that the UI feels uninspired and flat. I am an advocate for more skeuomorphic design, like that we see in RE 4 and 5. The charm of having something representative of what you're actually interacting inside of the Attache Case makes the entire experience more pleasant and makes me want to micro manage my inventory while the flat design in Requiem does not.
Outside of that one issue, this game has three really strong sections that feel cohesive and well thought out. I'm sure some parts will be less enjoyable on more playthrough, but 5 playthroughs in, they still hold up really well. As of time of writing, I have completed every challenge including the Final Puzzle and have completed 5 playthroughs. This game is phenomenal and is for sure one of my favorite Resident Evil games ever made.

Sun Moon Sun, Moon Star Moon out of 10.

The only reason not to play this game is if you're infected with the T-Virus.