I know most of the Bethesda RPGs have massive mod support, and there's games like Minecraft that have more mods than anyone can imagine. I would consider those games pretty playable in their vanilla states. Would you say there are any games that were "saved" by modding? Or that are still kept alive by thriving modding communities? What are some of your favorite mods?
Minecraft has a pretty solid vanilla experience but the depth of things you can do with mods is pretty insane. I’m playing a pack right now that basically turns it into a rogue like dungeon crawler.
Definitely RimWorld. There's so many mods that improve the base game. From QoL mods that make you wonder why that isn't default in the vanilla game, to mods that complety overhaul the actual win condition. Just overall a really fun, replayability, frustrating game.
Use mods though. It'll make it better. Check out p-music mod while you're at it.
Tabletop Simulator and Garry's mod is all modding, they would be very boring without it. (Tabletop might have the DLC addon content worth playing).
Cities Skylines fixes many of the broken aspects of vanilla and adds things to the point that Paradox added some of them into an enhanced console edition.
Slay the Spire, it's already an amazing game to begin with, but mods allow it to be absolutely insane with customization and cards. Even multiplayer is supported (Together in Spire) and works quite well!
American/Euro Truck Sim has a multitude of mods that add great stuff and even more realism to the game.
Call of Duty Black Ops 3 is more or less a bog-standard shooting game without mods, but the number of crazy, funny and innovative maps for zombies gives it an insane amount of replayability.
Late to this post but to me it's Minecraft. It has such an insane amount of replayability and can be turned into a totally different game depending on the mods and whatnot.
Factorio all the way. Get bored of finishing the game, or crafting the perfect megabases? Prepare for mods that can take 1000s of hours to finish. Perfection.
I know it's not as rich or developed as the Fallout or Skyrim franchise, but my fun little time waste Stardew Valley is greatly enhanced by mods.
The base game is incredibly fun and simple, but even the most basic mods enhance the "quality of life", making some of the more surface time eating elements easier. But then you have entire new world maps, NPC's, quests and full DLC-esque mods such as STV Expanded almost a must-have for long term players.
As an FYI, I'd highly recommend the game to even the most hardcore gaming aficionados. It's refreshingly amusing and low-key, so when Elden Ring has you ready to throw your controller at the TV, it's a nice mental break.
Plus the guy that created it learned how from scratch and coded the whole thing solo- the source, the sprites, even the music. And every upgrade and addition he's made over the years, easily 2-3 DLC's themselves, he's given away for free. Support indie devs!
There are plenty of older games where running some kind of widescreen or compatibility mod to get it working on newer hardware is the only way to get it running well, but that's kind of a boring techie answer.
In the spirit of the question, I'd say Fallout 4. The base game has a story I don't care about, factions that make no sense, and very little in the feeling of actual threat. I usually run between 200 and 300 mods to turn it into a truly post apocalyptic hellscape with functional radiation storms, low visibility in dust storms, darker night, less HUD clutter, more ghouls, proper flashlights, retuned weapon damage so things aren't so spongy, lots of new gear and weapons (I add in real guns but try to be tasteful and not add too much super modern tacticool stuff, but more cold war and vintage guns), backpacks, re-dress the Minutemen so they don't look like 1776 LARPers. Add tons of new sidequests and stories to find. The world becomes, this amazing, terrifying place to just explore and forget about the main plot. Returning home to my concrete walled safe settlement and my personal bunker living space really feels earned after exploring.
Just from a percentage standpoint, the Frackin Universe modpack adds so much to the Starbound experience which is otherwise relatively simple and something you only really play through once. There's like two or three extra Starbounds' worth of content, although that can make it overwhelming when starting out
Aside from the obvious minecraft... Arguably I'd say Factorio. They have a robust, feature-rich modding API built into the game that allows for relatively easy, wide ranging game play mods to be made very stable, and the number of mods has exploded as a result. The base game is amazing, but mods exist that quite literally triple the amount of game play and in some cases completely overhaul it into a totally new game. The support is amazing, and I wish more game companies could operate as efficiently as Wube does.
The original Doom for sure. I don't know if they count as mods since they're technically running on a modified version of the engine, but there is still a massive community making maps, mods, and even new game modes for it. Most recently the "MyHouse.wad" map for it has exploded in popularity. I've had so much fun over the years with doom mods, it's a treasure trove that most people have no idea exists.
There's even entire new games built on Doom. Sonic Robo Blast 2 Kart (stupid name, I know) is a fantastic free open source karting game with a decent community, and it's technically just a doom mod.
If anyone here is going to play a single doom mod to see what's up, I recommend Doom: The Golden Souls Remastered. It's good fun.
RimWorld. It's amazing what people can do from QOL to whole new factions or weapons. Amazing and the dev is very helpful during updates to try and not break mod support. Just blown away.
Risk of Rain 2 has a fabulous mod scene, with a lot of ways to make the game more wild - both in terms of power fantasy and in terms of difficulty - as well as modding in playable characters from other games, like League of Legends and Tomb Raider.
Slay the Spire also has excellent mods, so much so that the developers worked together with a mod team to creator a fan-made expansion.
Mount and Blade Warband! Base game is just ok, but mods like Diplomacy make it way better.
Then you look at Prophecy of Pendor or Perisno and you've got basically an entirely new game with the same engine and it's awesome. I have hundreds of hours of Mount and Blade, and probably only like 25 of them are vanilla.
I'm not sure its fair to say "most improved" but I do believe that Deus Ex is a game everyone should play, but I do not believe it is truly playable without some content mods to get the game running properly on modern hardware.
Valheim! A million and one mods to revitalize the game experience, and more than anything else the Valheim VR mod makes it an entirely new game! I’ve got 360 hours sunk into it with my 2 friends.
I really needed mods for The Witcher 3: Wild Hunt or I would have probably never finished the main story.
I had to get the mods that would autoloot and give unlimited inventory space, otherwise I would have minmaxed the game to tediousness by spamming pick-up and sorting through loot to keep the weight limit.
After getting the mods I could just focus on the story and gameplay without worrying if I'd maximised all my looting.
Cities Skylines is 8 year old and released their final DLC just recently. I'm positive their very impressive mod community can keep that game alive for 8+ years more, if Cities Skylines 2 should fail to measure up.
Project Zomboid mods are fantastic. There are insane amounts of them, and they add so much to the game.
Games like Skyrim and Fallout 4 become essentially infinitely replayable with mods. There's a tool called Wabbajack that essentially makes "modpacks" a thing for these games (and several others), and it's amazing. You can install and configure hundreds of mods in like 30 mins.
One of my personal favorite mods was "Hyrule Conquest" for 0 A.D., which is a complete overhaul of the game that turns it into a deep, lore-friendly Zelda RTS. It's still being worked on and it's still super high quality. The dev made some major changes to the play style that a lot of people love, but I personally strongly preferred the old style. It was more like Age of Empires before, but now it's more like Battle for Middle Earth and I don't care for it. If that's a selling point for you, it's very much still a great mod with a lot of love and passion put into it.
Civ 4 had a great modded scene. The Colonization remake/spinoff in particular has a must-have mod in the way of The Authentic Colonization. The main game, though, had loads and loads of incredible mods. My personal favorite was the Ryse series of mods, which tried to more accurately model the rise and fall of civilizations via various mechanics. I have a lot of hours in the random map variant of it, Ryse Rand.
Farming Simulator 22 and Snow Runner are both just absolutely different games when you add mods. The community is pretty active and the mod browser is built right into the menu, even on consoles. You can literally make your own game using mods. Without them, it could grow tiring after a while.
Space Engineers the base game is great, but it comes to life with mods.
From simple things like a more immersive way to paint blocks or customised UI to to hole NPC Factions, new Weapons, dekorative Stuff, all the way to hole new physics systems like Water with flotation, Aerodynamics or re-entry heat.
I rarely play my games with mods, this game is one of the few exceptions. I even went so far as to create some very minor mods my self.
Terraria, is still an excellent game but the Mod loader makes it tons better with plenty of feature mods and quality of life plus it is available from steam so easy set up.
Some I've modded besides what you said (Bethesda RPGs would be like, 8 games or something for me) would be Cities Skylines, Deus Ex, Factorio, Stardew Valley, Mount & Blade, Terraria, S.T.A.L.K.E.R.: Shadow of Chernobyl, Stellaris, Oxygen Not Included, Project Zomboid, Darkest Dungeon, Kenshi, Battletech.
I played vanilla Stardew Valley once, and now I'm on my second go around, and I've installed a bunch of qol mods so that I don't have to keep checking the wiki and my collections to see if I should keep or sell this item I got because I don't know if I need it for an achievement, and now I have a notification that it's an NPC's birthday and I can just check to see if I own or am carrying an item they have. It just makes the game less stressful for a completionist like me.
ARK: Survival Evolved. There are no corner pieces for sloped roofs without mods... I like a good sloped roof, and a building that's not just a square/a-frame.
Sins of a Solar Empire: Rebellion has a lot of love and care put into mods. Being a sci-fi game, plenty of Star Trek / Star Wars / etc. conversions that do more than just reskin the models.
Minecraft is an obvious answer of course, but there are some other really good games out there that get made much better with mods. Some of my favourite examples of this would be Star Wars Battlefront II (2017) with the cool hero mods and bot mods, and then Ghost Recon Wildlands with the amazing First-Person mod.
Well, as you mentioned, Bethesda games in general. I always mod Elder Scrolls and Fallout games to a ridiculous degree. But some more:
Star Wars: Knights of the Old Republic has a great modding scene. I personally find "Start as a Jedi" essential for replays. And most of the mods (including that one) work on the excellent Android port.
Also, I love randomizers. I do a Symphony of the Night randomizer run at least 4 or 5 times a year, the Super Metroid x Link to the Past combined randomizer is amazing, and I'm finally going to dip my toe into Dark Souls randomizer soonish.
I don't know if improving is the right word, but the amount of transformative mods older games like Doom, Half-Life or Unreal Tournament (and not just shooters ofc) had, was wild.
Team Fortress started as a Quake mod, Counter-Strike as a HL mod, DotA as a Warcraft 3 mod.
Assetto Corsa. Outlived it's shelf life by many years, and holds up to racing sims with much more modern engines, all thanks to the incredibly dedicated modding community.
Fallout New Vegas for sure, although many of the issues were fixed by the devs over the lifespan of the game. Mods are pretty much vital to run that game properly, however. Many issues with the engine and many core bugs have been fixed by the community, and it's honestly something where once you play with them fixed, it's hard to go back
I already answered differently, but I want to put out that the STALKER fandom is held together by mods. There are everything from almost invisible bug mods to an entire standalone mod. STALKER is one of those franchises where modding just seems like such a natural fit to round out the world and it’s amazing how the vast majority of mods intend to support the tone of the game rather than just adding in the whims of the mod maker.
Binding of Isaac is very improved by mods. Also, even if it's more plugins than mods, but every MMOs have a lot of plugins to custom the interface and make it more efficient for the type of gameplay you want
Ocarina of Time for 3DS on Citra in gorgeous with the HD Texture packs https://www.henrikomagnifico.com/ and you can also grab PS4 buttons to make it more playable and the motion controls with the PS4 controller are actually good.
The stutter and low quality on Breath of the Wild and now Tears of the Kingdom were unbearable for me, but BotW is phenomenal on Cemu and TotK is running on most computers at over 30fps, even in 4K, and my PC has a really nice processor in it and rarely drops below 60fps at 4K.
I didn't make it very far, but the Dolphin version of Skyward Sword using the thumbstick for sword instead of the crappy Wii motion controls was SOOO much better. I'll probably go back and finish that after I beat TotK.
Edit: oh, and the most important part of emulating those games is actually being able to set the attack/action buttons to something normal, like the playstation cross button instead of the Switch A / PS Circle. I love Nintendo games, but hate their stupid button layouts.
@SevenSwell EU4's modding scene vastly improves the game, with a variety of total overhauls available. Same goes for most Paradox games actually - the modding scene is usually well taken care of.
But I'd be lying to myself if I said anything other then Skyrim AE.
I cannot speak for the entire S.T.A.L.K.E.R. series, but at least the first entry (Shadow of Chernobyl) is, while still very much playable, just so much better with a couple mods. And once you're familiar with the core gameplay, adding huge mods like Anomaly or G.A.M.M.A. (which itself is a modpack of Anomaly) adds many weeks worth of replayability to the game. Not even mentioning how good the game can look with these mods that touch it straight up into 2023. Of course, here and there you'll still notice that it's based on an older game, but it can easily compete with AAA releases of the past couple years in terms of atmosphere and immersion (especially the sound design).
OG Diablo II is still thriving and kept alive thanks to some amazing mods, such as Project Diablo 2. Improved graphics, wide-screen support, and tons of QoL changes and additional content every few months keeps the game fresh and arguably, better than all other official iterations of Diablo out there.
I have spent many happy hours playing GW2 and ESO. Mods have improved the GW2 experience significantly, but the game is still playable without them, if somewhat annoying. ESO is completely unplayable without lots and lots of mods, at least for me. I'm so directionally challenged that I gotta have my minimap.
All of the older Grand Theft Auto titles were saved by modding originally (ignoring the remade definitive edition trilogy of course) GTA III, GTA Vice City, GTA San Andreas, and even GTA IV were all released for older hardware and much different technology at the time they were released, so there's some weirdness getting each of the games to run without issues or well on modern hardware and modern Windows. GTA IV specifically has a notoriously bad PC port that is at times hard to play without any mods or community made utilities.
All four games are substantially better with mods, from small things like restoring the original soundtracks for each of the games that have since been patched out due to licenses expiring, improving performance and stability, bug fixes, and even things like widescreen support. (Original GTA San Andreas specifically looks amazing with widescreen support and some other mods throw in)
My favorite mod currently is the GTA IV downgrader, found on GTAForums, it downgrades the version of your game, making it compatible with all of the most important utilities and mods made by the community.
All of them. I personally find Oblivion totally unplayable unless its been heavily, heavily modded, other games in the TES aren't as bad. I suspect that's why those games still have active communities is because of modding.
Seconding Rimworld, but even without mods it is an amazing game with easily 1k+ hours of gametime. My favorite mods are QoL mods, or ones that add additional flavor to my colonists. If I could only pick a single mod to install, ever, it would be Common Sense.
Outside of Bethesda and Minecraft, the other one that comes to mind is The Sims. More of a niche following, but for those that love deleting pool ladders, mods are necessary for happiness, flavor, and adding actual challenge.
I'd say it is definitly not any TES game. While the engine and released tools give amazing modding capabilities, it is still fine without mods. Back in the day, I spend 800 euro on a videocard just to graphically mod Skyrim. And I have no regrets. But I just as well regularily play on the Switch curreny, as I van continue on the train. Similarily I still booted Oblivion on my PS3 a while back. I feel TES games improve with mods, but aren't tge worst without.
Now for a game that "nééds mods" rather "thas great modding capabilities" I would say the first that comes to mind for me is Mugen. That old fighting game game with 1 stage and 1 character out of the box, but thousands of community made characters, stages, and new character select screens. It caused some videos of the ridiculous (in the best way) fights in a time YT was mainly weird but fun.
Beat Saber. It wasn't saved by mods, but almost any serious player will have a number of them installed to dramatically improve the experience. #beatSaber