Mods / Pennsy

• PPRR Pullman P70s | v1.3by 76561198327104786Steel cars became the new standard for safety and service, as well as durability and cost-effectiveness. The original steel cars followed the designs of earlier wooden coaches. Engineers quickly saw advantages in the new construction methods that made cars longer, lighter, long-lasting, and cheap...7.8k downloadsupdated 3 y ago
• PPRR L1 Post-War | v1.6by 76561198327104786The Pennsy class L1s were 2-8-2 "Mikado" type steam locomotives built between 1914 and 1919 by the Pennsy's own Juniata Shops as well as Baldwin Locomotive Works and the Lima Locomotive Works. Although the L1s were quite successful, they were outclassed in almost every way by the 2-10-0 "Decapods...7.0k downloadsupdated 3 y ago
• PPRR A5 | v1.2by 76561198327104786"In the 1920s many railroads in the United States of America had retired 0-4-0 steam locomotives, because they were too small for switching duties. This was not the case on the Pennsylvania Railroad. The Pennsylvania Railroad was keen on this wheel arrangement due to complex street and tight indu...6.4k downloadsupdated 3 y ago
• PPRR B6sb | v1.3by 76561198327104786Built between 1916 and 1920 by Altoona Locomotive Works, The Pennsylvania Railroad's class B6 was its most successful class of switcher, or as the PRR termed them, "shifter". Out of the total 238 B6sbs produced only 2 survive today, B6sb #1670 was saved in the PRR's historic collection at Northum...6.3k downloadsupdated 4 y ago
• PPRR M1 Pack | v1.2by 76561198327104786Pennsylvania Railroad M1 Mountain Type Pack " It was a class of heavy mixed-traffic locomotives of the 4-8-2 "Mountain" arrangement, which uses four pairs of driving wheels with a four-wheel guiding truck in front for stability at speed and a two-wheel trailing truck to support the large firebox...4.3k downloadsupdated 3 y ago
• PPRR L1 Pre-War Pack | v1.3by 76561198327104786Pennsylvania Railroad Pre-War L1 Pack "The Pennsy class L1s were 2-8-2 "Mikado" type steam locomotives built between 1914 and 1919 by the Pennsy's own Juniata Shops as well as Baldwin Locomotive Works and the Lima Locomotive Works. Although the L1s were quite successful, they were outclassed in a...4.2k downloadsupdated 3 y ago
• PPRR AAA-1 Triplex | v1.0by 76561198327104786"In the early to mid 1940's the Pennsylvania Railroad needed a powerful locomotive to assist in yard work in their various coal terminals. The Pennsy already had a large fleet of 0-6-0, 0-4-0, and 2-8-0 class switchers, but as war time freight traffic continued to escalate and the railroad requir...4.0k downloadsupdated 4 y ago
• [[Event!] PRR/LIRR DD1 Electricby KokoPennsylvania Railroad / Long Island Railroad DD1 Electric Pack "The Pennsylvania Railroad DD1 was a type of electric locomotive used by the Pennsylvania Railroad in the early 20th century. The development of the DD1 began in 1910, and the first locomotives entered service in 1911. The DD1 was des...2.9k downloadsupdated 4 y ago
• HHalloween Horror 2022 | The Keystone Projectby 76561198327104786Welcome to Halloween Horror 2022! Celebrate spooky season with all new Halloween themed liveries and mods! Includes Pumpkin A5 Blackout L1 6-6-6 No. 9 Credits Missy - Pumpkin A5 & Blackout L1, 6-6-6 No. 9 Koko - 6-6-6 No. 92.9k downloadsupdated 4 y ago
• HHeavyweight Packby 76561199134742015A collection of heavyweights, now updated with the new P70s, sporting various liveries, including: Lackawanna Baggage Lackawanna Green Baggage CNJ NJDot (updated) CNJ Green (updated) CNJ The Blue Comet (updated) NH McGinnis (updated) NH Green (updated) Lackawanna (updated) Lackawanna Green (updat...2.8k downloadsupdated 3 y ago
• PPRR Gold L1 | v1.1by 76561198327104786Anniversary 2023 - Weekly Livery #1 This is the first of 3 liveries that was released over the 3 week event period. The Gold L1 celebrates 1 year of the Keystone Project by paying homage to the original L1 mod released all the way back in 2022. It's road number is actually the L1 mod's release da...2.8k downloadsupdated 4 y ago
• PPRR Scrapyard M1 | v1.0by 76561198327104786Scrapyard M1 Hello everyone! As promised, here is the "unspookified" version of the Scrapyard Demon M1! Halloween Horror has always been a popular event for the Keystone Project, this year was no exception. Although a little smaller than what you're used to, the feedback we received on the Scrapy...2.6k downloadsupdated 3 y ago
• GGeneric Pullman Carsby 76561198405860768Good old Pullman Green, for literally whatever you need. Original mod by Missy2.0k downloadsupdated 3 y ago
• HHalloween Horror 2023 - Scrapyard Demon M1 | v1.0by 76561198327104786Halloween Horror 2023 - Scrapyard Demon M1 Happy Halloween everyone! Halloween Horror returns this year with a delightfully haunting treat for all of you, introducing the Scrapyard Demon M1! A bit of a step up in ambition from last year's goodies, it's been my main focus for pretty much all of Oc...1.9k downloadsupdated 3 y ago
• NNP heavyweight coachesby 76561199002878478NP heavyweights in Pullman green model by missy1.9k downloadsupdated 3 y ago
• PPRR catenary poleby microcosmologistuses 2 pieces to span 2 tracks - flexible spacing. Wire snap points for the powerline section1.7k downloadsupdated 5 y ago
• GGFS/GF&S heavyweight coach setsby 76561199002878478Features GF&S/GFS heavyweight coaches in 4 liveries - Pullman green - Treasure state blue - Blue and yellow - Black and Gold models by missy1.6k downloadsupdated 3 y ago
• GGFS D6 4 packby 76561199002878478GF&S/GFS D6 class steam locomotives. There are 2 in the early livery (1920s-19548) and 2 in the late livery (1949-1968) Model by MIssy, edits by me1.4k downloadsupdated 3 y ago
• AAmerican Freedom Train | The MEGA Passenger Packby 76561199227976433This pack goes well with HuskyDynamics's 4449! Check it out here!: NOTICE ABOUT UPLOADING Hello! As you may have noticed this usually isnt in my usual descriptions, but I have an announcment to make, I am officially... Starting to Upload EVERY DAY! Thats right! No more 3 day wait for amazing cont...1.3k downloadsupdated 3 y ago
• PPRR H6sbby 76561199534954886Hello there folks! You looking for another Pennsy engine to add to your collection? Well look no further than the PRR H6sb! Probably the most standard PRR engine you are going to get. It's a standard gauge consolidation built by the Altoona Shops between 1905 - 1913. The H6sb's have a tractive ef...1.3k downloadsupdated 9 mo ago
• PPRR MOW Snowplow | v1.0 [Anniversary Event Week 2]by 76561198327104786Hello everyone! The anniversary event continues this week with the MOW Snowplow! Huge thanks to Shinx for not only making the model, but allowing us to upload a livery of it as part of the anniversary event! Cheers! -Missy --- DO NOT REUPLOAD1.3k downloadsupdated 3 y ago
• PPRR Gold A5 | v1.0 [Anniversary Event Week 1]by 76561198327104786Hello everyone and happy anniversary! The anniversary event is back in celebration of the Keystone Project turning 2 years old! Just like last year, we have a set of 3 new weekly releases. Thank you to everyone for sticking with us this year, we have a lot planned for Year 2 and beyond so stay tu...1.3k downloadsupdated 3 y ago
• CCNJ 0-6-0by 76561198435714579Its a CNJ 0-6-0. What is there more to say.1.2k downloadsupdated 4 y ago
• PPRR E6by 76561199487343940hello! im back at it again with a new E6 livery! Enjoy! ---===Credits===--- Missy for the AMAZING L1 pack Koko for the Amazing K4 and D16 tender! CygnusOx for the USRA pack TheLudicrousAwesome Gamer for the 4-4-2 drivers ---===History===--- Class E6 on the Pennsylvania Railroad was the final type...1.1k downloadsupdated 2 y ago
• PPRR Layoutby 76561199013830221Smallish layout that shows a few different trains and a few Industrys. Industrys: Power Plant, Boxcar loading and Unloading area, Reefer industry intown Locomotives: Most of Missys Pennsy Locomotives ;-; A Largish Yard serving 2 Industrys and then a smaller one serving one Industry, A Decent 3 Tr...1.1k downloadsupdated 4 y ago
• PPRR H10 Pack (updated)by 76561199074240539The PRR H10s (2-8-0 "Consolidation" type) were steam locomotives built by the Pennsylvania Railroad (PRR) from 1916 to 1957. These locomotives were the last of the PRR's 2-8-0 class H locomotives, each subsequent class (H8, H9s) increasing the cylinder diameter by an inch. The H10s were particula...1.1k downloadsupdated 12 mo ago
• PPRR I1sa!by 76561199487343940credits to Missy for the amazing L1 and M1b models! Halton for the amazing USRA mikado model! Hey guys! im back at it again with a new I1sa model! ----====History====---- The Pennsylvania Railroad (PRR) class I1s steam locomotives were the largest class of 2-10-0 "Decapods" in the United States....1.0k downloadsupdated 3 y ago

27 pennsy mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.