It could be and is

Excellent! These are all correct.

4) Shadow of the Colossus

I've now played this game on three platforms - the original on PS2, the remaster on PS3 and the remake on PS4. As a result I've probably played through the game six or seven times. Even a decade and a half after its original release, there's still nothing quite like it. In many ways, it's a very risky game: you spend large amounts of time just riding your horse through nature with nothing but the sound of the wind and galloping hooves to accompany you. But frankly you need that downtime to cope with the exhilaration of the sixteen boss battles that make up the game. Each colossus is unique and beautifully designed; everyone has their own favourites. The arenas in which you fight them get just as much attention - the ancient ruins, the large lake, the sand cavern - and during these battles you get to hear one of the best soundtracks in gaming history. Very few games ever bring their players to the same emotional heights as striding atop an enormous titan and plunging your sword into their head to slay them, just as your grip gauge is running out and you're about to fall. Running alongside all of this is a subtle narrative thread, hinting at a much deeper backstory that (after the severe disappointment that was The Last Guardian) I now worry will never be realised. SoTC is unique and unforgettable and unquestionably one of the best games ever made. 

I really do have to play Witcher 3, don't I? I've got the PS4 digital edition with all the DLC and a PS5, so I'll wait till that version comes out. 

And here we have another masterpiece. Pandora's Tower was one the last big games for Wii, it was part of Project Rainfall together with Xenoblade Chronicles and The Last Story.

You explore long abandoned awe inspiring towers, that are now overrun with monsters. They are filled with big monuments, strange machinery and some environmental puzzles. With your chain you climb through these towers to the master beast, a being of majestic power. This all to save your loved one from the curse of the beast, which transforms her into a monster.

The game masterfully transfers a mood of sadness and mystery. The world seems to fall apart, the towers hanging by enourmous chains over a chasm that rips deeply into the world. Small hints, notebook entries, dreams help you slowly discover the mystery of what happened here. And the towers itself are filled with wonder. This all makes exploring so worthwile.

At the same time you shouldn't explore too long, because Elena will transform into a beast while you roaming the towers. Even if the timer isn't running out, she starts slowly to mutate and transform. And this makes her sad, a feeling transported both through her expressions, her dialogue and the music. If you return early though, you might find her in different activities that leave her happy and upbeat. So the game guides you to always keep Elenas well-being on the back of your mind and the will to return to her fast. So it is always a delicate balance between exploring just a bit more of the tower and to return to her early to keep her falling into depression. The interactions between your character Aeron and Elena are diverse, so it doesn't get old to be there for her.

This game is an underapreciated gem on the Wii. It came too late in the Wiis lifetime, further delayed in it's release in the West and getting way too less attention. After we now getting ports/remasters of Tokyo Mirage Sessions and Xenoblade Chronicles it is now definitely Pandora's Tower that is highest on my porting wishlist for Switch. This game deserves a second chance, it needs more exposure.

https://www.youtube.com/watch?v=hgB48Bq8Rho

Let's drop hints for the rest of the games:

#4: Tokyo Mirage Session #FE guessed by UnderwaterFunktown

#3
Yes, We were naughty. Completely naughty.
So many there used to be, almost a nuisance.

#2
Your character always carries a big book on his or her back, opening it in key moments to read and write in.

#1
This third installment of a spin-off series features the Grail for the first time.

Time for the very best:

4) The best-selling licensed game ever (I'm pretty sure).

The games are much more widely known than the source material.

3) It's not Star Wars, but it does have both space and opera.

2) "Like fools we clung to the old hatreds"

1) Exactly what you'd expect.

3) Mass Effect or Halo?

1) Ocarina of Time?

3) The Elder Scrolls V: Skyrim

This game needs no introduction or explanation. Skyrim is in many ways the game that defines its generation. The 7th gen was all about giving players freedom to explore and experiment, and grand open worlds that wouldn't have been technologically possible on weaker hardware. Oblivion was a great game and deserves its place in the top 50, but everything about Skyrim just feels cleaner and more expertly put together - in many ways a full realisation of what Oblivion promised. The combat, a weak point in many TES games, finally clicks with the seamless integration of weapons and magic and the two-handed system. The game world is absolutely stunning and the soundtrack brings it to life. The main quest isn't much to write home about, but the entire world is just bursting with interesting discoveries and quest lines. Even the AI, that butt of so much humour where Oblivion was concerned, genuinely works on this outing and gives you the sense that you're in a real world with real people. Though many games are mechanically stronger (including the two remaining games on the list) I don't think any game has ever matched Skyrim's sense of adventure and discovery. 

Nope to both.

Ocarina of Time was already on my list, and so was Breath of the Wild, before someone tries that.