Next set of hints.

#10

-The fallen leaves...

-...tell a story.

#9 Final Fantasy X

-On a pilgrimage to bring the Calm

#8

-The hunt begins

-But first, you'll need a contract

#7

-Ouroboros' plan is set in motion

-To raise the Liber Ark, which houses the Aureole

#6 Shadow of the Colossus

-Your request will be granted, just as long as you destroy all the idols

Guessed by drbunnig

This little puzzle game might be a bit obscure, but it still is however, very good. Kula World, or Roll Away in America, has you finding your way as a beach ball on a group of floating beams and blocks. You can roll from one end to the other, and at ends you can turn around to the sides or underside of a beam or jump to another if it is near enough. You'll have to find ways to get all the keys to unlock the exit to the next level. This is very challenging, and there's plenty of levels so I have never been able to complete it. I tried it a lot, and it is one of my most played PlayStation games. It is even the only game I re-bought as a Classic when it was re-released on PlayStation 3. The urge to try it once more was too great.

Guessed by Darashiva

Way up here in the list do we find MediEvil. The medieval fantasy adventure game that is the very best game to have ever graced a PlayStation console if you asked me. I immediately loved this game when I first got it. At first as a pirated game anonymously part of our endless stack, but then it turned out to be good enough to be bought for real. The game has character and lots of humour, has fun and varying level design and memorable locations and plot moments. The final boss, the sorcerer Zarok, is one of those moments. It has a couple of phases that story-wise call back to the great battle in the game's backstory, first you have to support allied soldiers fighting enemy soldiers by giving them your health, then fight Zarok's horseback general, and finally Zarok himself. Before he comes out, he's audibly powering himself up off-screen by using several enchantments, trying to find the best one to use. There's chicken sounds and other things, and then he comes forth, as some kind of strange dragon hybrid. It was the most ridiculous thing I had ever seen.

Guessed by drbunnig

Speaking of ridiculous things; Theme Hospital. This started development as a 'serious' hospital management game, but then the developers thought that would be too boring. I think they were right, because it turned out to be one of my all-time favourite games. If you want humour, you want Theme Hospital. I liked planning and decorating the interior of the hospitals and providing care for the patients as you progressed through the levels, only to have someone puke on my shiny clean floor. Okay, no big deal, I employed a janitor. Then there are rats though, so more puke. Let's shoot them. But now too many patients with different diseases are intermingling in the hallways and waiting areas. More puke. And then there is an emergency, a helicopter comes down dropping off eight critical patients as indicated with an icon of germs above there heads and you have to vaccinate them quickly. But they are walking through the puke now, and others get infected. Every tile on the floor is puked on. People are now dying in puke and they get taken by the Grim Reaper himself! Ahh! So stressful.

Top 15!

#15 - You can buy cosmetic items celebrating the heroic duo of this game in another game made by the same developer.

#14 - Forget about Turtles in Time; this is Frog in Time.

#13 - A content aggregator linked on this website is named after a race introduced in this game.

#12 - Eight years after this game released it got two successors -- one a direct sequel and one a prequel that happens to be #11.

#11 - See above.

Top 15!

#15 - You can buy cosmetic items celebrating the heroic duo of this game in another game made by the same developer.

#14 - Forget about Turtles in Time; this is Frog in Time.

#13 - A content aggregator linked on this website is named after a race introduced in this game.

#12 - Eight years after this game released it got two successors -- one a direct sequel and one a prequel that happens to be #11.

#11 - See above.

#18
- At the file selection screen, if you slightly misspell a prominent feature of the game, it’ll net you something good.
- If you want to find everything, you’ll have to opt for the worst possible prize at one point.
- As you conquer each world, the final boss’ stage draws ever closer.
- And the location of the final stage is the same sort of location that you start the following game in.
- A bonus stage hidden within a bonus stage? Pretty sneaky.
- The main overworld is shaped like the head of the character the game is named after.

#17 (incorrect guess - Resident Evil 5)
- More action oriented to its predecessor, this sort of indicated where the franchise it took its cues from was going to head in the future.
- A more linear game, less focus on puzzles, and upgrading your arsenal via points accrued in combat are some other features that differentiate it from its predecessor.
- Features more outside areas than its predecessor - a more natural environment for the variety of enemies you face.
- Unlike its predecessor, it features two playable characters, who you switch back and forth between throughout the game. One of these characters was the playable character in the previous game.
- There’s a few instances of first person action, where you have to defend the vehicle you’re travelling on. It wouldn’t be the last time this franchise dipped its toe into the first person perspective - much like the franchise from the same developer that heavily influenced this series, there was a light gun spin off.
- Uses pre-rendered backdrops, whilst its predecessor utilised 3D environments.

#13 (incorrect guess - The Wonderful 101)
- Introduces an audience that can help or hinder you.
- The size of the audience grows at certain intervals as you level up throughout the game.
- The last game in this series (to date) to utilise its particular battle system. Future games have tried different approaches to mixed receptions.

#11
- Those seven starred letters on the front cover certainly raised eyebrows.

My list so far

8 is Bloodborne. 

Just reading that line gave me shivers.  

10 is Elden Ring.

9) Technically this is the oldest these iconic characters have ever been
Hint 2: The word ancient is also used a lot in this game

For #8, I feel like this has to be an N64 game, specifically a sports game with the victory ceremony. Mario Kart 64?

#15 - You can buy cosmetic items celebrating the heroic duo of this game in another game made by the same developer.

#14 - Forget about Turtles in Time; this is Frog in Time.

#11
- Those seven starred letters on the front cover certainly raised eyebrows.

I've got fond memories of playing the demo for Kula World a fair bit as a kid (I played demo discs more than actual games back then!), and renting Theme Hospital.

7) My favorite DLC
Hint 2: First cutesy, then horror

6) The last three games in this series correspond to a different color each. This is the red one.
Hint 2: A famous detective is trying to catch you and your band of thieves.

Top 15!

#15 - You can buy cosmetic items celebrating the heroic duo of this game in another game made by the same developer.

#14 - Forget about Turtles in Time; this is Frog in Time.

#13 - A content aggregator linked on this website is named after a race introduced in this game.

#12 - Eight years after this game released it got two successors -- one a direct sequel and one a prequel that happens to be #11.

#11 - See above.

I guess my initial hints are generally too hard, let's see if these second ones will help:

10) It's every game ever created. It's Skyrim. It's Persona 3.
Hint 2: I picked this as my Game of the Year on Steam, but it's debatable whether it should qualify

9) Technically this is the oldest these iconic characters have ever been
Hint 2: The word ancient is also used a lot in this game

8) The unofficial return of a game and character I alluded to in my last batch of hints, but unfortunately they couldn't get the original voice actor onboard
Hint 2: Released in the same year as the long awaited sequel a VR spin-off.

7) My favorite DLC
Hint 2: First cutesy, then horror

6) The last three games in this series correspond to a different color each. This is the red one.
Hint 2: A famous detective is trying to catch you and your band of thieves.