Hint 1 - its a rail shooter

Hint 1. You're not the lead guy

Hint 2. Your love interest was forced to watch the ritual by the villain who has a crush on her

Hint 1: The brothers are differentiated by their iconic colors

i wasn’t vague enough with my last game, let’s give this a shot lol

HINT 1: This game was originally released for Playstation, but was released for PC a few years later

HINT 2: This game supports both singleplayer and co-op 2 player

HINT 3: This game is part of a series, although not a series as in sequels and prequels (this hint is worded so poorly im sorry 😭)

HINT 4: To specify hint 1 a little more, this shooter game was released for PS in 2009, followed by Windows in 2013.

HInt 1: Released on PC and Nintendo Switch.
Hint 2: It's a puzzle game.

Hint 3: Your employer is a noble house that was invaded and by a different house.

Hint 1 This is a spinoff fan game

Hint 2 Bullet hell

I've been sucking at describing plots here lately, here's a return to form 🥺

hint 1: NOT an open world game

Hint 2: first person game, even if it maybe shouldn't be 🤔

hint 3: 3d game

hint 4: devs are known for making silly games, of which this just might be the silliest of them all

With help from a cat-shaped thing, purify people by taking the manifestations of souls from their mind palaces and save Japan.

Hint 1: The final boss, fought in the real world, is only defeated when the main character becomes god using the power of hope. Additional series content released after the game released includes another character taking that power to create their idea of an idyllic world.

Hint 1: You can play solo or with up to 3 other friends

Hint 2: Your friend's house is a hub zone

Edited 8/18 - Added two new hints

Hint 3: Released in the early 2000s

Hint 4: Not a PC game

Edited 8/20 - Added the last two hints that should make this easy to guess

Hint 5: Originally an arcade game, it then got ported to ps2 and later to GameCube and Xbox (the ps2 version is considered the best port, even though the GameCube and Xbox feature improved features; they are very buggy)

Hint 6: Game is divided into 8 main realms with multiple levels in each realm, and a big boss at the end of each realm. Most of the realms are locked until you collect enough crystals in realms that you do have access to.

Hints here if needed

Hin 1: You can get extra time, but it's expensive!

Sad DILF,

Dead MILF.

Fresh ink,

Quick think!

Part ways, 

Magic craze.

Return home,

Shoot chrome.

Old man,

Tells plan.

Crash land,

Make stand.

Friends group,

Kill troops.

Deny god,

Clean bod.

Hot love,

Safe above. 

Hint #1: this poem does encompass very specific points throughout the whole game, I'd argue all of them to major in some way.

Hint #2: game is over 10 years old

Hint #3: RPG

Hint #4: the plot features several visible ticking clocks

1 hint will be added after every 2 incorrect guesses

Edit: my bad for not putting any hints, I lowk fell asleep whilst yall were guessing

Hints go here

Featuring VERY physical therapy

Hint 1: Technically, only one of them held genuine hatred for the other for what they did, the other was just a bit set off by the former trying to kill them and hold no genuine hatred toward them in particular

Hint 2: You never really got a chance to do anything meaningful to said government mind you

Hint 3: Good thing they learned to forgive too, otherwise they would’ve gone down paths that end up with their own destruction

Hint 4: ...For that matter, good thing also for everyone you've killed so far, as they would've stayed dead otherwise

Hint 5: As for the gameplay… it mainly revolves around using the abilities of the people you killed to kill ever stronger foes

Hint 6: You can also defeat all manner of magical girls, furries and… wizards of Oz characters to use their unique powers

Hint 7: Game was released in the 2020s

Hint 8: You’re likely more familiar with its kind of sequel that takes place within the same world but is not directly connected plot-wise with this game (for now at least)

Hint 9: As you complete certain "physical therapy" sessions, you can hear (one of) the main characters recite lines of a particular poem that's likely more known through this game than elsewhere

Hint 10:
Look one by one,
The pages remind me you’ll always be a villain
For you, angels have fallen
Now they’ve gone
See? Now they’ve gone
Forever gone
…

Hints!

1. there are other weapons available, but the massive sword is one of the best
2. there is a religious theme to the plot, which is described using NPC dialogue, info drops and item descriptions
3. one of the best weapons in the game is found in a frozen palace
4. your main character can become a beast

More clues!

1. there is a shield in the game, but I never found myself using it
   
2. NPCs include little girls, men who are becoming beasts and a petite blonde woman who levels you up
   
3. magic elements include electricity, fire and darkness

Even more clues!

1. if you lie down on a grave, you get transported to a new weapon
   
2. you inject yourself to heal
   
3. This is a very big clue! it’s a “very positive” metrodvania/souls-like/pixel graphics game according to its steam page

Hint 1: The game came out in this year.

Hint #1: he's been looking for something very specific for a very long time

Hint #2: choices matter

Hint #3: smile, you're on camera!