
Train Simulator: Union Pacific Big Boy Steam Loco Add-On
The ultimate experience of taking the throttle of American steam – big steam – awaits you with the magnificent and extraordinary Union Pacific 4-8-8-4 Big Boy as created by Smokebox and now available for Train Simulator!
Offers
What are keyshops?Official stores
Official stores with direct support.
Base game (1)
This is the base game required to play this DLC. Other expansions may also be required.
Required DLC (1)
You also need to own these DLCs for this content to work. Other expansions may also be required.
Multipacks (1)
DLCs (200)
About Train Simulator: Union Pacific Big Boy Steam Loco Add-On
Union Pacific’s famed 4-8-8-4s were designed with a specific task at hand – being able to handle 4,400-ton trains, without helpers, over the rugged grades of the railroad’s crossing of Utah’s Wasatch Mountains. Designers of the UP, together with the American Locomotive Works (Alco) went to work and in 1940 Alco constructed a group of twenty leviathan 1.3-million-pound, 132-foot-long 4-8-8-4 articulated locomotives. During construction of the first locomotive – Union Pacific 4000 – a worker scrawled “Big Boy” in chalk on the locomotive’s smokebox door and the name, like the locomotive, became forever iconic.
During World War II, Union Pacific acquired an additional five Big Boys and in addition to working the Wasatch crossing, the railroad’s fleet of 25 Big Boys became regulars on UP’s Sherman Hill in Wyoming. The last of the 4-8-8-4s remained on the UP roster through the late 1950s and befitting the type’s fame, no less than eight were preserved. In 2019, as part of the 150th anniversary celebration of the American transcontinental railroad, Union Pacific Big Boy 4014 was returned to service as a member of UP’s Heritage Fleet.
Developer Smokebox is highly respected for its authentic re-creations of steam locomotives – including its AT&N 2-8-0 Consolidation and superb Union Pacific FEF-3 4-8-4. And now, the Smokebox Union Pacific 4-8-8-4 takes Smokebox’s artistry and realism to even greater levels! In addition to an exacting replication of the Big Boy’s operating controls, characteristics, sounds, and visual details, the Smokebox 4-8-8-4 features innovative features including an optional auto-fireman and auto-engineer, making the locomotive accessible to all users. And the Big Boy also features a range of customization details, a selection of era-authentic freight rolling stock, and realistic scenarios on the Train Simulator Union Pacific Wasatch Grade: Ogden - Evanston Route (route available separately).
The ultimate experience of taking the throttle of American steam – big steam – awaits you with the magnificent and extraordinary Union Pacific 4-8-8-4 Big Boy as created by Smokebox and now available for Train Simulator!
Included Scenarios
Four career scenarios featuring the Union Pacific Big Boy on the Train Simulator Union Pacific Wasatch Grade: Ogden - Evanston Route are included:
- Big Boy Max Tonnage EB, Part 1
- Big Boy Max Tonnage EB, Part 2
- Big Boy Max Tonnage WB, Part 1
- Big Boy Max Tonnage WB, Part 2
More scenarios are available on the 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!
Key Features
- Ultra-realistic Union Pacific 4-8-8-4 “Big Boy” steam locomotive
- Complete and authentic operating controls and characteristics
- Optional configurations for all levels of difficulty from manual operations to auto-fireman and auto-engineer assists, the locomotive is also compatible with Simple Controls
- Three locomotive livery variations
- A variety of customizable locomotive details
- Actual 4-8-8-4 locomotive sounds
- Late-1940s era-authentic freight rolling stock in multiple liveries and with a variety of loads; equipment includes boxcars, refrigerator cars, flat cars, hopper, tank car, and Union Pacific CA-4 steel caboose in brown and yellow liveries
- Four career scenarios featuring the Union Pacific Big Boy on the Train Simulator Union Pacific Wasatch Grade: Ogden - Evanston Route
- Quick Drive compatible
- Download size: 798.5MB
Game details
Game details
Age ratings
Game modes
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Train Simulator: Union Pacific Big Boy Steam Loco Add-On price history
Lowest tracked price: €15.39 (Jul 7, 2026) · current best: €15.39.
Train Simulator: Union Pacific Big Boy Steam Loco Add-On player count & reviews
95% positive reviews all-time · 0 peak players in the last 30 days.
Train Simulator: Union Pacific Big Boy Steam Loco Add-On — frequently asked questions
Where can I buy Train Simulator: Union Pacific Big Boy Steam Loco Add-On at the cheapest price?
Right now the cheapest offer for Train Simulator: Union Pacific Big Boy Steam Loco Add-On is €15.39 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price Train Simulator: Union Pacific Big Boy Steam Loco Add-On has ever been?
The lowest price KingsPrice has tracked for Train Simulator: Union Pacific Big Boy Steam Loco Add-On is €15.39 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
How many people play Train Simulator: Union Pacific Big Boy Steam Loco Add-On?
Train Simulator: Union Pacific Big Boy Steam Loco Add-On peaked at 0 concurrent players on Steam in the last 30 days (highest on Jul 20, 2026). The player chart on this page updates daily.
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System requirements
Minimum
- OS *: 32-bit Windows 7 Service Pack 1, 8.1 or 10 Required (Other OS versions and types are not supported)
- Processor: Intel Core-i3 4330 3.50 GHz Dual Core or AMD A8 6600K 3.90 GHz Quad Core or Better
- Memory: 4 GB RAM
- Graphics: NVIDIA GeForce GTX 750 Ti or AMD Radeon R9 Graphics with 1 GB Dedicated VRAM or Better
- DirectX®: 9.0c
- Network: Broadband Connection (May incur additional costs for use)
- Storage: 40 GB or more available space (Additional Add-Ons will require more)
- Sound Card: DirectX Compatible Audio Device
- Additional Notes: Requires mouse and keyboard or Xbox Controller
Recommended
- OS *: 32- or 64-bit Windows 7 Service Pack 1, 8.1 or 10 Required (Other OS versions and types are not supported)
- Processor: Intel Core-i5 4690 3.50 GHz Quad Core or AMD Ryzen 7 1700 3.80 GHz Quad Core or Better
- Memory: 4 GB RAM (maximum possible under 32-bit Windows)/16 GB or Better (For 64-bit Windows)
- Graphics: NVIDIA GeForce GTX 970 or AMD Radeon RX 480 with 4 GB Dedicated VRAM or Better
- DirectX®: 9.0c
- Network: Broadband Connection (May incur additional costs for use)
- Storage: High Performance SSD Recommended with 40 GB or more available space (Additional Add-Ons will require more)
- Sound Card: DirectX Compatible Audio Device
- Additional Notes: Requires mouse and keyboard or Xbox Controller












































































































































































































