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User reviews:
Positive (13 reviews) - 92% of the 13 user reviews for this game are positive.
Release Date: Sep 18, 2013

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This content requires the base game Train Simulator 2017 on Steam in order to play.

Buy Train Simulator: Southern Pacific GP20


Pro Range

The Pro Range is aimed toward the serious train simulation enthusiast looking for a complex machine to master. Each product is designed to provide education and entertainment for users. Xbox controller and HUD interface support do not come as standard and users will need to read the accompanying documentation to fully understand the operation of this advanced simulation.

See the entire Pro Range

About This Content

The second generation EMD GP20 ushered in a new era of turbocharged locomotives on American railroads, and now this 2,000hp heavy freight hauler is available for Train Simulator in Southern Pacific livery.

The EMD GP20 was seen as leading the way in a new age of turbocharged diesel locomotives, even though some of EMD’s competitors had been experimenting with higher horsepower models several years earlier. In reality, the GP20 only offered a small increase in horsepower over its predecessor, the GP18, but EMD’s salesmen touted the locomotive’s ability to reduce consist sizes and maintenance costs, and increase speeds to secure sales.

GP20s could be identified ahead of similar GP7, GP9 and GP18 models by an additional small radiator fan ahead of its large aft fan, the prominent bulge behind the cab which housed its turbocharger, and a single large exhaust stack.

Of the 260 models built by General Motors’ Electro-Motive Division between November 1959 and April 1962, Southern Pacific operated 34 locomotives and also took ownership of the four demonstrators originally used by EMD. Many of the locomotives served reliably for more than 30 years but were less promising for rebuild programmes than other GP classes, and most were scrapped. However, some can still be seen on short lines today with two models officially preserved.

The EMD GP20 for Train Simulator, developed by Reppo, is available in Southern Pacific livery and features a highly detailed cab interior with operating switches, advanced and standard driving controls, realistic engine start up procedure, accurately modelled simulation, engine overheating and working unit selector.

The locomotive is also Quick Drive compatible, giving you the freedom to drive the EMD GP20 on any Quick Drive enabled route for Train Simulator, such as those available through Steam. Also included are scenarios specifically for the Donner Pass route (available separately and required to play these scenarios).


Two scenarios for the Donner Pass route:
  • Freshly Frozen Norden Waters
  • Sparks-Reno Shuttle

More scenarios are available on Steam Workshop online and in-game. Train Simulator’s Steam Workshop scenarios are free and easy to download, adding many more hours of exciting gameplay. With scenarios being added daily, why don’t you check it out now!

Click here for Steam Workshop scenarios.

Key Features

  • EMD GP20 in Southern Pacific livery
  • Quick Drive compatible
  • Realistic engine start up procedure
  • Accurately modelled simulation
  • Working unit selector
  • Opening interior switch cabinet
  • Highly detailed cab interior
  • Advanced and standard driving controls
  • Scenarios for the Donner Pass route
  • Download size: 164mb

System Requirements

    • OS: Windows® Vista / 7 / 8
    • Processor: 2.8 GHz Core 2 Duo (3.2 GHz Core 2 Duo recommended), AMD Athlon MP (multiprocessor variant or comparable processors)
    • Memory: 2 GB RAM
    • Graphics: 512 MB with Pixel Shader 3.0 (AGP PCIe only)
    • DirectX: Version 9.0c
    • Network: Broadband Internet connection
    • Storage: 6 GB available space
    • Sound Card: Direct X 9.0c compatible
    • Additional Notes: Quicktime Player is required for playing the videos
Customer reviews
Customer Review system updated Sept. 2016! Learn more
Positive (13 reviews)
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11 reviews match the filters above ( Positive)
Recently Posted
Posted: January 14
I just purchased the Sp GP20 add-on plus the BN and UP GP20s and i can not figureout how to get the locos moving in STD ADV and ADV running ? ANY ideas. How do i get a full shot of the cab.
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Most Helpful Reviews  In the past 30 days
1 of 1 people (100%) found this review helpful
Posted: September 14
Reppo has built a reputation for quality DLC add-ons; The Southern Pacific EMD GP20 is where it all started. Released three years ago as of the time of this review (September 2016) this locomotive surpasses most of the in-house produced Dovetail Games locomotives in terms of quality, even today. Known for attention to detail and realism, Reppo is also the talent behind the Pennsylvania Railroad Baldwin Centipede and the Western Pacific EMD GP20 High Hood.

First Impressions:

For an older DLC offering, this one looks very good and holds it's own against newer product offerings from Dovetail Games. Textures look good. The 1960's "Bloody Nose" paint scheme is spot-on. Locomotive exhaust looks good. The locomotive has working roof-top fans, including the dynamic brake fan which is aliased to the dynamic brake controls so that it turns on/off when you turn the dynamic brake on and off (super cool). The brake cylinders and rigging on the locomotive trucks is animated (awesome). Dynamic weather effects are included for the windows and the winshield wipers work. The advanced version has realistic start-up and operational procedures. There is an engine kill-switch on the electrical cabinet. If you don't want to play with the advanced model, a standard model is included.

Sound FX:

The sounds are pretty good. The engine block sounds like its real-life EMD 567 counter part. There are sound effects for the bell, sanders, and air-horn. Air-brake release makes a nice "whooshing" sound. the screeching of brake shoes clasping the wheels is included. The cab controls, wether they be levers, switches, or buttons all make the usual "thunking", "clicking", and "popping" sounds.

Lighting FX:

Lots of good stuff here. Locomotive has working headlights, numberboard lights, class lamps, cab lights and instrument lights. There are also working step/platform lights. All of these FX are independently functional and have their own on/off switches.


I have developed a bench mark test for locomotive performance; I run 100 car grain hopper trains (a simulated 10,000 tons) over various portions of the Cajon Pass Route DLC at a ratio of one horsepower per ton (that's five GP20s) to test the locomotive physics and I am satisfied that these locomotives performance closely mirrors their real world counterparts. The locomotives tractive effort and horsepower curves seem realistic to me. Of course, the only way to know for sure is to dig through the game files and compare the specifications there to the real world manufacturers specifications. However, I feel these locomotive are very good in this regard. Likewise, I feel the braking physics are acceptable; In terms of dynamic brakes and air-brakes the locomotives seem like they handle very well.


Two scenarios are included with this DLC with more available in the workshop. No rolling stock is included. However, two other liveries are available for this locomotive; one in Union Pacific and one in Burlington Northern (both sold as seperate add-ons).


There is no sound effect for the Dynamic Brake, a real disappointment for me and frustrating to know that three years later it still hasn't been patched. Doors and windows do not open; strange, as the Digital Train Model EMD SD45 released around the same time has opening windows and doors. Locomotives do not have air hoses that connect. No rolling stock is included, which is a shame becuase it was a chance for the Train Simulator game to get some 1960's vintage Southern Pacific Rolling Stock. Locomotive does not include dynamic snow FX. Last but not least, there are not enough liveries for this locomotive. There are several route DLCs that are available for Train Simulator whose railroads rostered the the EMD GP20 and for which we have no liveries, including the Santa Fe, BNSF and Great Northern. I also feel that the Union Pacific and Burlington Northern liveries should have been included as a three-for-one pack.


-Highly visually detailed
-Advanced model has realistic start-up and operational procedures
-Regualar non-advanced model included
-Locomotive physics are very good
-Long lived locomotive good for simming from 1960s to the present day
-Two other liveries available as add-ons


-Lacks dynamic brake sound FX three years after release
-Doors and windows do not open (locomotive DLC of a similar vintage from other content providers has this).
-Lacks air hoses that connect
-Lacks snow FX
-Lacks rolling stock
-liveries for Santa Fe, BNSF, and Great Northern (companies for which we have route DLC) are conspicuously absent.


The Southern Pacific EMD GP20 from Reppo is still a good value three years after it's release (2016). While not perfect, the release of this DLC set the stage for a general improvement in DLC add-on quality, the likes of which can be seen in the products from Digital Train Model, Virtual Rail Creations, and Smokebox. This DLC combines attention to detail, operating realism, and proper physics in a package that is fun to play with. The EMD GP20 is a classic and iconic second generatoin North American diesel that will be right at home on your Southern Pacific, Union Pacific, and Burlington Northern Routes. I would definitely recommend this DLC to my friends.

Final Verdict: Clear Block! You may proceed and make your purchase!
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Most Helpful Reviews  Overall
7 of 7 people (100%) found this review helpful
Posted: October 5, 2014
I really enjoy the start up procedure, decent challenge, especially when starting cold. :)
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7 of 8 people (88%) found this review helpful
Posted: October 6, 2014
Really the best American Diesel in the whole DLC library, because it's the only one with actual operational features for start up and running, along with operational physics and limitations not found in any other locos.

SImply the best for diesel driving that you can get here.
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5 of 5 people (100%) found this review helpful
Posted: April 2, 2015
Very realistic sounds, and a incredible P3 air horn. The engine sound when its running, isn't really good though. It has a good start up procedure also. There are also a BN/UP re-paint for this, witch would be very useful for Pacific Northwest routes. Over all, Ill give this a 8.5/10
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5 of 5 people (100%) found this review helpful
Posted: October 6, 2014
This is one of those engines you just don't see on the simulator. The startup procedure is not that hard to learn how to do and its fun to run small local trains with it. Its fun just to fire it up in free roam and pull a small local train with it from one town to the next. The model is good. Sounds are average. Thumbs up.
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4 of 4 people (100%) found this review helpful
Posted: November 27, 2015
I just love this little engine! Has a great horn and bell with it to. I like the cold start set up you have to do in order to get it going. If you don't like that, you can always select the standered version in game and get the one that's already started up.
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3 of 3 people (100%) found this review helpful
Posted: June 18, 2015
This is one of the top locomotives available. Along with Smokebox's FEF-3 and Consolidation, and the U36, this is a "must have" item. There's a bit of a learning curve with the advanced version, but you'll be very happy that you bought it. Highly recommended, without reservation.
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7 of 11 people (64%) found this review helpful
Posted: December 21, 2014
This is higher than average when it comes to TS DLCs the start-up sequence is great, i still need to understand the locomotive coupling system and it has all these little extra simulation aspects.

Definitely recommended.
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2 of 2 people (100%) found this review helpful
Posted: January 13
Consider my review a double recommendation. This addon is that good. From the looks of it you could say "yet another American freight engine". But this one is different in a few significant aspects:
- The sounds are great. I don't know about accuracy, but they just feel adequate for a 100+ ton machinery this loco is.
- Cold start. I can recall a few other loco addons with this feature (e.g. Class 90, GT3 Turbine, Class 57), and GP20's has the most complex one. There are working fuses, circuit breakers and switches all over the cab.
- Temperature management. No joke. Fans may be switched on and off separately. And being too harsh on the engine may make it overheat.
- No notable problems with either the loco or supplied scenarios. I thought it was worth mentioning since Donner Pass hasn't been the best route of choice when it comes to scenario quality.
- Price. It costs the same as most loco DLCs on Steam but offers way more features.
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2 of 5 people (40%) found this review helpful
1 person found this review funny
Posted: October 5, 2014
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