So I think it's actually really important that the games that would be considered objective masterpieces would have to overcome any language barriers and be an experience approachable by anyone. You can learn the mechanics to enjoy the gameplay without words
So:
Portal
Journey
Binding of Isaac
Shadow of the Colossus
Metro 2033 (which I have sat on and I believe even if it was entirely in Russian you would still get it )
DOOM (original you don't need words you shoot)
Super Mario Bros. 3
Katamari Damacy
Then there are dialogue option stories that are fantastic stories that I could consider greats but shareable masterpieces is hard to say as they rely on you speaking the language both literally and then gameplay wise:
Story-driven: The Last of Us, Horizon Zero Dawn, Halo, Batman: Arkham Asylum, Uncharted, HL2, Chronicles of Riddick: Escape from Butcher Bay, Splinter Shock, The Walking Dead
Platformer: Braid, Ori and the Blind Forest, Mario 64, Crash Bandicoot, Spyro, Limbo
Action/roguelike: Bastion, Hades
RPG: Fallout: New Vegas, Mass Effect
Puzzle: Lumines, Puzzle Quest, World of Goo, You Must Build a Boat, Reigns, Threes, Meteos
Celeste. Emotional narrative that seamlessly blends with the gameplay, which implementa never before seen accessibility configuration, enhanced by one of the best soundtracks ever. All while being cheap, indie, and one of the best speedrun games ever made
I think Bioshock 1, Inscryption, Portal 1 & 2(I believe that 2 wouldn't be so loved if we didn't already love 1, I like to think of them as a set), Silent Hill 2, Resident Evil, Nier Automata, and Okami.
Metro 2033. Played it in the dark with good surround sound headphones on, and it's positively claustrophobic.
Last Light is good too, but at little too optimistic IMHO. 2033 nails that endless pit of despair feeling, with just enough lucky breaks that you might make it through.
Chromehounds was the greatest mech game on shitbox 360 and you can't change my mind.
The sheer variety in player created metas was glorious to behold. Sure, you could play how the game encouraged you to play and hang your weapons in "normal" configurations. But you could also bury whole teams in indirect fire with a triple double from across the map. You could build a little punchy boi buggy with a dick piston, cockpit, wheels, and nothing else. You could even try to sweat the meta in the chicken leg howitzer or the turtle up in the armored crab.
The only limits were creativity and spacer availability lmfaooo
Originally a paid DOS game and the developer is a cool dude who changed it to freeware. You can download it on myabandonware or archive org. Then grab a free copy of DOSBox.
In my view, it is the best shape packing game ever made, and it never really got its due, possibly in part to somewhat extra complexity, and partly from the time it came out.
You learn the ropes in the early modes, but you really need to play on EXTREME Mode. There are many different special pieces, and you decide how to move them in the playfield and rotate them.
There are mud traps and acid pits and missiles and bombs and traps. And you have to not only play the shape packing aspect, but you have to continually think about how to deploy these hazards, to your best advantage, or least disadvantage!
Over the years, I continually come back to this game, and I have probably sunk over a thousand hours since I was young.
We'll see how much is recency bias and how well it will stand the test of time, but I really think Clair Obscur: Expedition 33 will be on this list going forward. It's definitely one of the best games I've ever played, and I've played a lot of games. It's not perfect, but it's close enough in all the parts that actually matter.
Fez - cute little 2D/3D platformer. It's amazing and very wholesome
Stalker: Shadow of Chenrobyl - dunno what exactly is it, perhaps the settings and the grit, but it has a special place in my heart. It's about average FPS, but not too long and for me enjoyable
F.E.A.R. - very good FPS, with amazingly scripted enemies, decent horror elements (not compulsory - you might miss some of them if you're not looking).
Prince of Persia: Warrior Within - for me the best 3rd person action adventure ever. Best combat hands down (or head, or torso, you choose), streamlined blade dance at your fingertips. You play with your enemies, and you get many tools. There are some locked camera issues.
Touhou: Lost branch of time - If you liked Slay the Spire, but wished for colorful mana, this is the game for you. It has anime artstyle, I usually focus on the cards, though it might turn some people off
Dota 2 - Dunno if it was mentioned and I didn't see, but the mechanics are absolutely amazing, the things the game lets you get away with are incredible. 10/10, but other people might bring your experience down. Specially friends. Can play against custom (workshop) bots. Still takes too long to git gud. I studied the game for 10 years and still sucked.
Divinity 2: Original Sin - also haven't seen a mention, everybody talks about BG3, I haven't yet played it, but D2:OS was also a masterpiece. Haven't played a lot of TRPGs, this was a blast, with easily set up multiplayer. Played through it twice completely, with many abandoned runs.
CS 1.6 - remember that? I lost my childhood to that. They don't make counter strikes this good anymore.
Synthetik - top-down rougelike shooter, with amazing weapons and physics and classes and enemies and mechanics and 2 person multiplayer
Dwarf Fortress - the real objectively best game :D strategy simulation of the 3D box world, predecesor to both Minecraft and Terraria, but with A LOT more sand in your box. They are still extending it. And it's on Steam if you want a UI.
Terraria (Calamity mod) - Terraria is obviously a great game, but what makes it 20/10 is the mods. Calamity specifically. Tripple the content, 5x the difficulty (20x if you try Infernum), amazing multiplayer experience. Don't install Infernum if you haven't beaten at least Revengeance on Calamity. Trust me, it will fuck you up.
Yakuza 0 - how could I forget about this masterpiece? Story done absolutely right, that game had no business making me feel so strongly about it. Cool combat, very funny moments, but I cried during it. If you haven't tried it, check it out. You won't regret it.
OpenTTD - Trains. Do you like to create and manage big rail systems? This is for you. And your friends. Only noobs use planes. Only psychos use boats. Nobody uses only vehicles.
Curious to hear what the criteria for "masterpiece" is, otherwise I think it is just peoples' subjective opinion of what makes a great game that they also think others might agree about being a great game. Genuinely curious, interested in discussion, not saying this to shut down any of the answers here.
There is not a single word in the game, barely any control but the game take you through an emotional story.
It's multiplayer in a sense that you might meet another player, they can help you, you can help them or just continue on your path and despite not having any words it just fell like a genuine, pure connection with someone.
Assuming that "masterpiece" refers to the quality and impact the games had in their time (not how well they aged) some of my picks would be:
Baldur's Gate 2 + ToB
Star Wars: KotoR
Morrowind
Read Dead Redemption 2
The Witcher 3
The Last of Us 1+2
God of War
Shadow of the Colossus
The Legend of Zelda: BOTW
Mass Effect 1+2
Disco Elysium
Half Life 2
BioShock 1
Diablo 2
Fallout 2
I don't know how objective this list is. Some picks are definitely subjective and fit more in a "flawed masterpiece" category of games that had a large impact on how I perceived games but that may not be so widely acclaimed as some others on this list.
I think Outer Wilds is the most unique and fantastic way to tell a story I've ever experienced. Truly open in a way I've not seen before or since.
With the banger of a soundtrack too, I just can't bring myself to rate other games higher than it; even if I enjoy them more, Outer Wilds is probably the best game I've ever played.
Slay the Spire probably makes the list as it's inspired countless tweaks on its incredibly balanced deck building experience
Prey, System Shock 2, Outer Wilds, and Undertale are fully-realized microcosms where the primary game is unfolding the complex origami of the setting. All of them absolutely beautiful to experience.
Katamari Damacy. It has a reputation for being silly Japanese nonsense, but the gameplay is brilliant, the graphics are timeless, the soundtrack is incredible, and it has some surprising thematic depth.
It counts as a masterpiece because of how well it blends game design, gameplay and story. I have played very few games as thoughtful, or that weaved the gameplay together into the story it was telling in such a meaningful way. I never thought once in my life that I would think philosophically about bullet hell but somehow Nier Automata has something profound to say and even manages to say it using bullet hell as a gameplay mechanic.
On top of all this, it also has a lot to say about classical philosophers, their works, and honestly deeply subverts things they had to say. It asks tough questions about their thoughts and ideas, once again, through gameplay. Numerous characters are named for classical philosophers: Pascal, Jean-Paul, Simone, Engels, Immanuel... (Yoko Taro obviously has feelings about how Jean-Paul Sartre treated Simone de Beauvoir.)
Further, Yoko Taro is doing something that a lot of game developers fail to manage to do: He is embracing gaming as a storytelling medium and eschewing the traditional three-act arc from film. Because gaming is not film. As Marshall McLuhan posited, "the medium is the message" and unlike other developers Taro's writing is aimed at the medium he is working in instead of leaning on the ropes and tropes of other mediums. (Referring back to above, tying the gameplay into the story, focusing on the medium)
It's basically impossible to not break down into tears at the ending.
Don't write it off because of the scantily clad anime women. Stay for the depth of the human condition. It is truly a masterwork in multiple respects.
There is no "objective" when talking about subjective terms.
My personal, SUBJECTIVE favorites are Mass Effect, Titanfall 2, Subnautica, Stardew Valley, Ori and the Blind Forest, Dave the Diver, Balatro, and Portal 1 and 2
The DS had plenty of fantastic games, but when it comes to a game I feel had the most beautiful example of using the controls in a creative way, I'd say The World Ends With You takes the cake.
I've literally never played a game that needed such a high degree of multitasking, not just for mental multitasking, but also hand-eye coordination. Playing that game on Hard mode felt crazy, and I literally never unlocked Master mode. Balancing between the top and bottom screen characters was such a challenge, especially if you're actually trying to make use of the green puck for more damage. The fact that each partner has their own battle method is fantastic too, as you never get too comfortable with one character until you finish the game.
Add in fantastic art design, catchy soundtrack, funny & memorable main cast, and you get absolute peak. I can't believe Square let that game rot for more than a decade. The Neo TWEWY sequel was pretty good too, but nothing will literally ever compare to the original's controls. It's just so addicting man.
Zelda Breath of the wild for me. Don't get me wrong I enjoyed Tears of the Kingdom but breath of the wild scratched a perfect itch for me. Especially master mode. Well over 1000 hours played.
I see Outer Wilds here but not Nioh 2, so I'm posting about Nioh 2.
Soulsian adventure with ninja gaiden blood, extremely high amount of endgame content, wild depth of character building, lots of avenues to increase your character's power with many "correct answers" to the question of "how should I make my dude stronger". Dropped a while before the most recent push for graphical fidelity with AI upscaling/antialiasing so it actually runs well on a large majority of steam hardware surveys machines.
It's hard early on, but provides the player with tons of options when it comes to progressing through stages and bosses, flexible movesets for each class of weapon and access to potent tools like Gun and turning into an enemy that killed you a dozen times the first time you saw it briefly. The endgame goes beyond replaying through the game into dungeons made of fragments of the stages and some more unique maps (The Abyss). There's a hefty amount of individual bosses to learn, and incentive to do some of the more fun fights in the game multiple times - a lot of which do not require a run back through a stage to get to them. The game does itself a service by breaking up gameplay into chunks with a world map you launch missions from, some of which are just a singular straight up boss fight.
Roller Coaster Tycoon 1. (2 was weaker without OpenRCT2, the real masterpiece, but idk if unfinished projects should count or not)
Quake 3 Arena, Unreal Tournament 1999 GOTY, Worms Armageddon, SimCity 3000 Unlimited, Forza Horizon 2 / Motorsport 3, Need for Speed Underground 1, Clonk! Rage, Metal Gear Solid 1/2/3, Ace Combat 4, Okami, Tokyo Jungle, Zelda BOTW, Mario Odyssey, Sven Co-Op, Killing Floor 1, Final Fantasy 7, LISA: The Painful, Everhood 1, Deus Ex 1, Left 4 Dead 1/2, Portal 2, Battlefield Bad Company 2... Champions of Norrath and Return to Arms, Diablo 1, Baldur's Gate 3 makes the list...NIER both games. Planet MiniGolf.
MAD MAX from 2015, while not tied directly to the new movies it scratches an itch I haven’t found in any other game. It’s dark and bleak and brutal. The combat on foot and behind the wheel are both incredible. Nothing quite like being in the middle of ripping a convoy 7 new assholes and being hit with a dust storm. It can be repetitive if you want to complete everything but BY THE GODS OF VALHALLA is it a fucking blast.
I'm taking this to mean games that stand out in or define their genre, are widely considered to be excellent, are timeless, and there's very little if any fat to trim.
Super Mario Brothers - NES
Super Mario 64
Dark Souls - maybe Elden Ring takes over?
Return of the Obra Dinn
Half Life 2 - honorable mention: Left 4 Dead 2
Diablo 2
Doom
Tetris
Chrono Trigger
Legend of Zelda: A Link to the Past
Portal 2
Little Nightmares - honorable mention: INSIDE
GTA SA
Tony Hawk Pro Skater 2
These aren't necessarily my favorite games, but games I think are well respected. I probably missed a bunch.
Hades. Transcends the rogue-like genre through incredible writing, art direction, and music. The gameplay is some of the most addictive I’ve ever played. I’m at over 200 hours logged and I still get lost in it.
It's about as simple as a 'modern' game can be (I read there was even a port of it to Commodore 64.) but it's a finely tuned machine. When you lose - and you will, a lot - it feels like mostly your own fault and not the game's.
The difficulty levels very accurately start at Hard for the easiest one. There are 6 total levels, the next 5 difficulties are Harder, Hardest, Hardester, Hardestest, and Hardestestest.
With much time and luck I can beat the first level (unlocking the 4th). On a lost save I had unlocked the 5th level by completing the 2nd, and have only ever seen the 6th in videos from other people. I would have to beat the 3rd to see it myself, and that's not happening.
The criteria to beat a level is "last for 60 seconds".