Mekanism, hands down.
Followed VERY closely by Fallout 2 Restoration Project.
I love mekanism, often run it as my only mod
Rimworld multiplayer.
I really want to check that out, but it is incompatible with my favorite mod: Save Our Ship 2. I refuse to give up SOS2 just to play with another human.
Its pretty smooth but I’ve had a lot of desync issues because I have a long list of mods I try to play with.
They do PvP on the mod. Its pretty cool you have 4 teams and each player controls 1 pawn and the fight for objectives and capture and craft their way to victory.
Sven-Coop for Half-Life 1.
I’ve played, almost daily, since the mod was released in January 1999. Over a quarter century. I’ve got admin in a number of servers, so a lot of days I’m just hopping on briefly to make sure the servers are running smoothly and no one is trolling. New maps are still being regularly released, many by people who have been mapping for it for a solid 15-20 years.
No idea of total hours. It wasn’t added to Steam until 2016, but I have multiple thousands of hours logged since then. I’ve got to be over 10-12k hours since the beginning. Easily.
Everything else in my life has shifted. Sven-Coop is my rock.
I couldn’t pick a single one, but I got endless joy from all the Quake mods back in the day. Not just level designs and sprite replacement, but complete weapon changes that made everything different, Quake Kart, Cujo, etc. It seemed the sky was the limit.
I don’t know if time has been kind or not, but when I discovered Fall from Heaven II for Civilization VI I never launched the base game again.
I think I haven’t played a single skirmish round of Company of Heroes 1 without the Blitzkrieg mod in the past 15 years.
Terraria - Calamity.
Expands the game to 2.5x the content.
Absolutely amazing, would recommend buying Terraria just to play it.
Gigastructural Engineering for Stellaris… the megastructures included in the game and DLC are great, but they lack a certain insanity. Plus the mod allows you to terraform any planet (even gas giants).
Garry’s Mod
It’s hard to think of any one mod that got remotely close to changing a game the way GMod did for HL2/CS:S/source engine titles. I spent thousands of hours in GMod as a kid, it added infinite teplaya ility to the HL2 campaign, forums like Facepunch and PHWOnline became my second home. There was a ton of content to be loaded from there and FPSBanana, the thriving webcomic scene was truly special.
Better Than Wolves it’s a minecraft overhaul that was started by the veteran game designer FlowerChild who was pissed at Mojang that they are adding useless features that don’t improve gameplay loop (wolves being the breaking point). So he spent many years making Minecraft challenging survival and interesting tech game.
While I haven’t beaten the dragon once in that game (not many people have) it still gave me hundreds of hours of entertainment.
Enderal, a whole new game built ontop of Skyrim. Offers an entirely different setting, map, class system, enemies, spells, and has an actual story that you will not soon forget.
I had genuinely forgotten about it without playing it. Thanks for mentioning it.
Just started that recently, very good so far.
I’ve never been one to mod games, I’m pretty vanilla when it comes to gaming. Play the base game and thats it. Rarely do i even try any dlc. With that said, I thoroughly enjoyed Frelancer discovery back in the day. It is a freelancer multilayer mod that brought a lot more content and enabled multi player once the official servers were gone.
The mod that got me into modding still has a special place in my heart. It was the Shockwave mod for C&C Generals. Shockwave absolutely could have been vanilla if EA deigned to finish the Zero Hour expansion. It was just pure polished perfection for that game.
Sky UI. Not the same game without it.
So mandatory that mentally I don’t even consider it a mod.
Archolos, and it’s not even close. This is one of the best gaming experiences i’ve had in years
Screw Gothic 3 and 4, this is the real sequel us Gothic fans have been waiting for! A genuine delight to play through, and the Polish voice acting was just as incredible as it was in Gothic 1 and 2, despite being a fan project! Waiting patiently for the Mod of the Decade edition to re-play it again and try out all the new things they add (very excited for the teased mage path!)