10 Best PC Games With Mods (2026)

Q: Do mods work with the Steam version of these games?

Yes — most use the Steam Workshop directly ( RimWorld , Cities: Skylines , Garry's Mod , Kenshi ), which means one-click subscribe-and-play. Factorio uses its own in-game portal, and Bethesda titles like Fallout 4 and Skyrim split between Workshop and Nexus Mods, the larger of which (Nexus) needs a free account.

Picked by GameGeeker Editors · Jun 3, 2026, 10:12 AM·listDetail.views: 3,205 Comments

A great mod scene does something no patch ever can: it keeps a game alive years after the credits roll. Some of the titles below are pushing a decade old and still top the most-played charts every week, purely because the community refuses to stop building. That is the lens we used here. We did not rank by review score or sales. We ranked by how much a healthy mod ecosystem actually changes the game in your hands.

The Top 3 in 30 Seconds: The Elder Scrolls V: Skyrim Special Edition for the deepest, most beginner-friendly mod scene on PC · RimWorld for a colony sim where the mods practically become the game · Cities: Skylines for an endless Workshop of maps, assets, and overhauls.

Why These Made the List #

Three things decided the order:

Ecosystem size and momentum — how many mods exist, and whether new ones still ship every week (Steam Workshop counts, Nexus Mods activity, dedicated mod portals).
Ease of entry — can a first-timer install a mod in two clicks, or does it demand a load-order manager, script extenders, and a weekend of YouTube tutorials?
How far mods stretch the lifespan — quality-of-life tweaks are nice, but the games that earn a top spot get total conversions, new campaigns, and overhauls that double or triple the hours you sink in.

The GameGeeker editors have run every one of these with a stuffed load order. We have broken our own Skyrim saves at 250 mods, lost entire weekends to RimWorld colony disasters caused by a vehicle mod, and rebuilt the same Cities: Skylines metro three times because a better transit mod dropped. The ranking below reflects what that experience taught us about which mod scenes are worth your time.

Top Picks #

1. The Elder Scrolls V: Skyrim Special Edition #

No game taught more people how to mod than Skyrim. Bethesda's Creation Engine was built to be overwritten, and fifteen years of modders have turned a 2011 RPG into a platform you can rebuild from the ground up — new lands the size of the base game, voiced quest mods with original casts, survival systems, and graphics overhauls that look like a 2026 release.

Why It's Ranked Here: The combination of sheer depth and a gentle on-ramp is unmatched. You can one-click Workshop mods for a casual pass, or dive into Nexus, Mod Organizer 2, and SKSE for a 300-mod build. Nothing else offers both ends of that spectrum.
Who It's For: Anyone who wants their first modding project, and veterans who treat load-order tuning as its own hobby.
Key Selling Points: Tens of thousands of mods across Workshop and Nexus, full Creation Kit access, and total-conversion projects (Enderal, Beyond Skyrim) that are essentially standalone games.

2. RimWorld #

For a lot of players, RimWorld is not really a game you mod — it is a game you assemble. The Workshop hosts over 43,000 mods, and a serious colony run might stack 150 of them before you even start: alien races, vehicles, custom medical systems, weather, whole new tech trees. The base storyteller AI is just the foundation everyone builds on.

Why It's Ranked Here: Few games are this transformed by their community. RimWorld's clean XML-driven modding means content scales endlessly, and the dev team actively supports it. Your colony sim becomes a sci-fi epic, a medieval fantasy, or a comedy of errors depending on your load order.
Who It's For: Systems thinkers, storytellers, and anyone who loves a sandbox where everything can go catastrophically, hilariously wrong.
Key Selling Points: 43,000+ Workshop mods, dev-supported modding, and frameworks like Combat Extended and Vehicle Framework that overhaul core systems.

3. Cities: Skylines #

The original Cities: Skylines became the city-builder of record largely because its Workshop is bottomless — well over 300,000 maps, building assets, and tools. Want a working metro that obeys realistic timetables? A prop-anarchy tool to place a stadium pixel-perfect? A real-world map of your own hometown? Somebody already built and shared it.

Why It's Ranked Here: The Workshop turns a competent builder into the most flexible city sandbox on PC. Asset creators and tool authors (Move It, TM:PE, Network Anarchy) have made the modded version the de facto way to play.
Who It's For: Urban-planning obsessives, screenshot architects, and anyone who finds the vanilla road tools too polite.
Key Selling Points: 300,000+ Workshop items, essential tooling that the community treats as standard, and custom maps that import real cities.

4. Factorio #

Factorio's modding lives on its own dedicated portal, and it is one of the most polished pipelines in the hobby — mods install and update in-game with no external launcher. The headline content is enormous: overhaul mods like Krastorio 2, Space Exploration, and Bob's & Angel's don't tweak the factory, they replace the entire tech tree and stretch a 40-hour game into a 400-hour obsession.

Why It's Ranked Here: The technical quality is exceptional. Factorio's modding API is so robust that overhaul mods feel like official expansions, and the in-game mod portal makes setup painless.
Who It's For: Optimizers, automation addicts, and anyone whose idea of relaxation is a perfectly balanced production line.
Key Selling Points: Native in-game mod browser, total-conversion overhauls, and a modding API rich enough to build genuinely new games inside.

5. Garry's Mod #

Here the mods aren't an enhancement — they are the entire point. Garry's Mod ships as a physics sandbox with no goals, and its Workshop holds over 1.7 million add-ons: game modes, maps, props, NPCs, and whole community staples like Prop Hunt and Trouble in Terrorist Town that became genres of their own.

Why It's Ranked Here: No other title is this completely defined by user content. GMod is less a game than a creation engine, and its two-decade Workshop is the largest add-on library on Steam by a wide margin.
Who It's For: Tinkerers, friend groups looking for party games, and creators who want to build interactive scenes with zero coding.
Key Selling Points: 1.7 million+ Workshop add-ons, community game modes that spawned spin-offs, and a sandbox that's a blank canvas by design.

6. Stardew Valley #

ConcernedApe's farm sim is already one of the most replayable games ever made, but the SMAPI mod loader takes it somewhere else entirely. Install one tool and you get clean access to thousands of mods: new farms, automation, marriage candidates, expanded towns, and quality-of-life tweaks like the Time Master mod that finally lets you finish a day's plans.

Why It's Ranked Here: It is the gentlest entry to modding on this list. SMAPI handles the heavy lifting, mods rarely conflict, and the content ranges from tiny convenience tweaks to story expansions (Stardew Valley Expanded) the size of a sequel.
Who It's For: Cozy players, completionists, and anyone who wants modding without a load-order spreadsheet.
Key Selling Points: One-tool SMAPI setup, the massive Stardew Valley Expanded overhaul, and a community that prizes stability and polish.

7. Terraria #

Terraria's base game is already stuffed with content, and tModLoader — now an official, free download on Steam — opens the door to mods that dwarf it. The legendary Calamity mod alone adds dozens of bosses, hundreds of items, and a new endgame; stack Thorium and Fargo's on top and you have a 2D sandbox that can run hundreds of hours past the vanilla finale.

Why It's Ranked Here: tModLoader being a one-click official tool removed the only real barrier, and the overhaul mods are genuinely massive — Calamity is closer to a sequel than a tweak. The pixel-perfect crafting loop scales beautifully with more content.
Who It's For: Sandbox-survival fans, boss-rush enthusiasts, and co-op groups who burned through the base game and want more.
Key Selling Points: Official one-click tModLoader, total-conversion content packs (Calamity, Thorium), and seamless co-op with mods installed.

8. Fallout 4 #

Fallout 4 inherited Skyrim's modding DNA and pushed the settlement-building and gunplay angles further. The Nexus and Workshop scenes are deep — texture overhauls, new quests, weapon packs, and ambitious projects like Fallout: London, a free fan-made expansion the size of a full game. The Creation Kit is open, so the ceiling is effectively the community's patience.

Why It's Ranked Here: It carries the Bethesda toolset's power with a modern engine, and the settlement systems give modders a second sandbox to expand. The fan-expansion scene rivals Skyrim's.
Who It's For: Wasteland wanderers, base-builders, and players who want a Bethesda RPG that mods can keep current.
Key Selling Points: Open Creation Kit, the standalone-scale Fallout: London project, and deep settlement and weapon mod ecosystems.

9. Mount & Blade II: Bannerlord #

Bannerlord's medieval sandbox is a modder's dream because its bones — battles, economy, factions — are so open to rewriting. The Workshop and Nexus host everything from quality-of-life staples to total conversions that transport the whole game to Westeros, Middle-earth, or the Warhammer world, complete with new maps, troops, and lore.

Why It's Ranked Here: Few sandboxes invite total conversions this readily. The setting-swap mods (Realm of Thrones, Old Realms) are practically standalone strategy RPGs, and TaleWorlds' continued engine support keeps them viable.
Who It's For: Strategy-RPG fans, fantasy-setting lovers, and anyone who wanted a Game of Thrones or Warhammer battle simulator.
Key Selling Points: Setting-swap total conversions, deep gameplay-rebalance mods, and an open engine actively supported by the developers.

10. Kenshi #

Kenshi is a brutal, freeform squad sandbox with no story to hold your hand, which makes it perfect mod soil. Its Workshop holds over 17,000 mods that reshape factions, add races, rebalance the punishing combat, and even bolt on entirely new regions. Many veterans consider a modded Kenshi the only way to play, smoothing rough edges the tiny dev team never got to.

Why It's Ranked Here: It is the cult pick that rewards modding the most — the vanilla game is rough, but the right load order turns it into one of the most unique survival sandboxes on PC. The community essentially co-develops it.
Who It's For: Hardcore sandbox survivalists, world-sim devotees, and players who like their freedom total and their mercy nonexistent.
Key Selling Points: 17,000+ Workshop mods, faction and region overhauls, and combat-rebalance packs that fix the vanilla difficulty curve.

Comparison Table #

Game	Genre	Why It's Ranked	Mod Source / Price (USD)
Skyrim Special Edition	Open-world RPG	Deepest, most beginner-friendly scene	Workshop + Nexus / $9.99 (sale)
RimWorld	Colony sim	Mods practically become the game	Workshop / $34.99
Cities: Skylines	City builder	Bottomless 300K+ Workshop	Workshop / $29.99
Factorio	Automation sim	Best-in-class in-game mod portal	Mod portal / $35.00
Garry's Mod	Physics sandbox	Mods are the entire game	Workshop / $9.99
Stardew Valley	Farm sim	Gentlest one-tool modding	SMAPI / Nexus / $14.99
Terraria	Sandbox survival	Official tModLoader + huge overhauls	tModLoader / $9.99
Fallout 4	Open-world RPG	Bethesda toolset + fan expansions	Workshop + Nexus / $19.99
Mount & Blade II: Bannerlord	Strategy RPG	Setting-swap total conversions	Workshop + Nexus / $49.99
Kenshi	Squad survival sandbox	Cult pick that mods transform most	Workshop / $29.99

How to Pick the Right One #

Brand new to modding → Stardew Valley and Terraria — one-click tools (SMAPI, tModLoader), few conflicts, instant payoff.
Want the deepest rabbit hole → The Elder Scrolls V: Skyrim Special Edition and RimWorld — thousands of mods, total conversions, endless tuning.
Want mods to add hundreds of hours → Factorio and Mount & Blade II: Bannerlord — overhauls and setting-swaps that feel like new games.
Want a sandbox where mods are the point → Garry's Mod and Kenshi — built to be rebuilt by the community.
Want city-building freedom → Cities: Skylines — the Workshop tooling is the de facto way to play.

FAQ #

Which of these is easiest to start modding? #

Stardew Valley is the gentlest on-ramp. You install the SMAPI loader once, drop mods into a folder, and almost nothing conflicts. Terraria is a close second now that tModLoader is a free one-click download on Steam. The Elder Scrolls V: Skyrim Special Edition also has a casual path through the Steam Workshop, though its deeper Nexus builds take more setup.

Do mods work with the Steam version of these games? #

Yes — most use the Steam Workshop directly (RimWorld, Cities: Skylines, Garry's Mod, Kenshi), which means one-click subscribe-and-play. Factorio uses its own in-game portal, and Bethesda titles like Fallout 4 and Skyrim split between Workshop and Nexus Mods, the larger of which (Nexus) needs a free account.

Can I play these mods in co-op or multiplayer? #

Some, yes. RimWorld is single-player but has community multiplayer mods; Terraria supports modded co-op directly as long as everyone runs the same tModLoader mods. Garry's Mod is built around modded multiplayer servers. For Bethesda RPGs and Factorio, modded multiplayer works but everyone in the session needs the identical mod list.

Will modding break my saves or hurt performance? #

It can, which is why load-order management matters. Heavy builds in Skyrim or RimWorld can tank framerates or corrupt saves if mods conflict — use a manager (Mod Organizer 2, RimWorld's built-in sorter) and add mods gradually. Lighter ecosystems like Stardew Valley and Factorio rarely cause problems.

What's the best one to start with? #

If you have never modded a game, start with Stardew Valley — the payoff is immediate and you cannot really break it. If you want the full modding experience and don't mind a learning curve, The Elder Scrolls V: Skyrim Special Edition is the one that defined the hobby, and the one with the deepest content waiting for you.