# TS Marketplace: DD35 Demonstrator Add\-On

Summer DB entity ID: 1b92238a\-db0c\-40b0\-a4cb\-9312d6a74e3a

Steam App ID: 513116

The DD35 Demonstrator pack, which requires the Union Pacific DD35 Add\-On to use, enables you to drive the Gp35 and DD35 as they appeared in 1963 when being demonstrated on various railroads but only Union Pacific and Southern Pacific took on the units\.  The DD35 was a cabless booster \(B unit\) locomotive that consisted of two GP35 prime movers and electrical systems, mounted on a common frame and covered with a single cowling, riding on a pair of 4\-axle Flexicoil trucks\. As such, each prime mover powered a single set of four axles instead of two sets of two axles, as in the GP35\. Features:   Number board lights   Class lights   Step lights   Cab and instrument lighting   Animated doors, windows and cab mirrors

## Game information

- Type: dlc

- Developer: Digital Train Model

- Publisher: Dovetail Games \- Trains

- Release date: Jun 15, 2017

- Coming soon: false

- Free to play: false

- Parent Steam app: 24010

- Genres: Simulation

- Categories: Single\-player, Downloadable Content, Steam Achievements, Full controller support, Steam Trading Cards, Steam Workshop, Steam Cloud, Steam Leaderboards, Family Sharing

- Platforms: windows

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_d39c9bb48131e58df949ed71c47e46cfb2efa10a\.1920x1080\.jpg?t=1728376593, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_562c1f7c332fff0b7d3cfbb8ddf3157a6ae4f382\.1920x1080\.jpg?t=1728376593, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_df6ecdde0b46091a35dbbb47b4a108830d201a0e\.1920x1080\.jpg?t=1728376593, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_74f6cd4c2b023f271c77ae46ae50d7ece80f03f7\.1920x1080\.jpg?t=1728376593, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_fb549abac9a62b8a4bdfda9901095aff8f5e2880\.1920x1080\.jpg?t=1728376593, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_e73284b36512c003e25b183a8572748dd0501077\.1920x1080\.jpg?t=1728376593, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/513116/ss\_08d587f8d3ca6a820fb6994e90f763d1a5041741\.1920x1080\.jpg?t=1728376593

- Price: 499 minor units USD; discount 0%

- Price country: US

## Observed metrics

- Current players: Not collected

- Steam review count: 3

- Steam positive reviews: 2

- Steam negative reviews: 1

- Steam positive percentage: 66.66666666666667%

- Summer DB rating: No native votes

Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}

## Player history

[Seven-day chart data as Markdown](/api/v1/entities/1b92238a-db0c-40b0-a4cb-9312d6a74e3a/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/1b92238a-db0c-40b0-a4cb-9312d6a74e3a/player-metrics?days=7)

Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown.

## Sources and freshness

- Catalog membership: store\_catalog

- Catalog observed: 2026\-09\-28T16:58:32\.455488\+00:00

- Details observed: 2026\-09\-22T13:58:35\.975202\+00:00

- Player count observed: Not collected

- Reviews observed: 2026\-09\-22T13:58:36\.96414\+00:00

Full provenance: \{"urls":\{"price":"https://store\.steampowered\.com/app/513116/","catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/513116/","players":null,"reviews":"https://store\.steampowered\.com/appreviews/513116"\},"price":"2026\-09\-22T13:58:35\.975202\+00:00","source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-22T13:58:35\.975202\+00:00","players":null,"reviews":"2026\-09\-22T13:58:36\.96414\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":"e71e5a6b\-92c1\-4483\-a01d\-0a3b06720676","catalog":"9f60ba07\-2b3f\-4686\-a3fa\-59cb820c90aa","details":"3823992a\-a9ed\-40b6\-8290\-67c63616ae16","players":null,"reviews":"280e8ff6\-9823\-46f1\-8090\-97957b3bb2e3"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"1b92238a\-db0c\-40b0\-a4cb\-9312d6a74e3a","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\}

Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted.

[Steam store](https://store.steampowered.com/app/513116/) · [JSON](/api/v1/games/1b92238a-db0c-40b0-a4cb-9312d6a74e3a)