| 12601 | Trainz Plus DLC - VR K Class Type 3 (K184/185) - In Service Black | 4212310 | DLC | — | Catalogue |
| 12602 | Trainz Plus DLC - VR K class - K190 2 Tone Green | 3116590 | DLC | — | Catalogue |
| 12603 | Trainz Plus DLC - VR K class Type 4 (K186-K192) - In Service Black | 3659630 | DLC | — | Catalogue |
| 12604 | Trainz Plus DLC - VR M Class 4-4-0 - Early 2 Tone Green | 1959713 | DLC | — | Catalogue |
| 12605 | Trainz Plus DLC - Victorian Railways D1 Class (Type 4 - Newport) Black | 1946588 | DLC | — | Catalogue |
| 12606 | Trainz Plus DLC - Victorian Railways Type 2 DD Class Pack | 1947633 | DLC | — | Catalogue |
| 12607 | Trainz Plus DLC - Victorian Railways Type 4 DD Class Pack - Canadian Red | 1947634 | DLC | — | Catalogue |
| 12608 | Trainz Plus DLC - Victorian Railways V Class 2 Tone Green | 1945531 | DLC | — | Catalogue |
| 12609 | Trainz Plus DLC - Victorian Railways V class FL Black | 1945297 | DLC | — | Catalogue |
| 12610 | Trainz Plus DLC - Victorian Railways V499 - Baldwin Built | 1946291 | DLC | — | Catalogue |
| 12611 | Trainz Plus DLC - Warwick to Wallangarra Route | 1948040 | DLC | — | Catalogue |
| 12612 | Trainz Plus DLC - Yellowstone Mountain & Central Railroad | 2439860 | DLC | — | Catalogue |
| 12613 | Trainz Plus DLC - ZecRail 2017 Christmas Train | 1959735 | DLC | — | Catalogue |
| 12614 | Trainz Plus DLC - ZecRail V499 Blue & Gold and Christmas 2019 | 1946292 | DLC | — | Catalogue |
| 12615 | Trainz Plus DLC - Znamensk-Svir | 1959770 | DLC | — | Catalogue |
| 12616 | Trainz Plus DLC - [TL] Bald Knob - Wynne | 3932320 | DLC | — | Catalogue |
| 12617 | Trainz Plus DLC - [TL] Crawfordsville - Clements | 4009800 | DLC | — | Catalogue |
| 12618 | Trainz Plus DLC - [TL] Pivdenni Stepy - UZ | 3609360 | DLC | — | Catalogue |
| 12619 | Trainz Plus DLC - [TL] Rainsville - Danville | 3321840 | DLC | — | Catalogue |
| 12620 | Trainz Simulator DLC: Aerotrain | 24673 | DLC | — | Catalogue |
| 12621 | Trainz Simulator DLC: BR Class 14 | 24678 | DLC | — | Catalogue |
| 12622 | Trainz Simulator DLC: Blue Comet | 24634 | DLC | — | Catalogue |
| 12623 | Trainz Simulator DLC: CONTZ Pack - Basic Edition | 318050 | DLC | — | Catalogue |
| 12624 | Trainz Simulator DLC: CONTZ Pack - Standard Edition | 317690 | DLC | — | Catalogue |
| 12625 | Trainz Simulator DLC: Coronation Scot | 24677 | DLC | — | Catalogue |
| 12626 | Trainz Simulator DLC: Nickel Plate High Speed Freight Set | 238991 | DLC | — | Catalogue |
| 12627 | Trainz Simulator DLC: PRR T1 | 24676 | DLC | — | Catalogue |
| 12628 | Trainz Simulator DLC: SNCF - AGC Languedoc | 318960 | DLC | — | Catalogue |
| 12629 | Trainz Simulator DLC: SS4 China Coal Heavy Haul Pack | 24679 | DLC | — | Catalogue |
| 12630 | Trainz Simulator DLC: The Duchess | 24635 | DLC | — | Catalogue |
| 12631 | TramSim DLC Betriebsbahnhof Wien | 1586691 | DLC | — | Catalogue |
| 12632 | TramSim DLC Type E1 | 1921280 | DLC | — | Catalogue |
| 12633 | TramSim DLC Type ULF | 1586690 | DLC | — | Catalogue |
| 12634 | Transcendence - Eternity Port Expansion | 383320 | DLC | — | Catalogue |
| 12635 | Transforming my fiancée - DLC | 4550480 | DLC | — | Catalogue |
| 12636 | Transiruby - FM Synthesis style BGM pack | 1823420 | DLC | — | Catalogue |
| 12637 | Transport INC - Map Pack | 1845920 | DLC | — | Catalogue |
| 12638 | Trash Goblin - Found Family Cosmetic Pack | 4601680 | DLC | — | Catalogue |
| 12639 | Trash Goblin - Founder's Pack | 3710960 | DLC | — | Catalogue |
| 12640 | TravelRoute Studio - Custom Watermark Pack | 4409150 | DLC | — | Catalogue |
| 12641 | TravelRoute Studio - Pro Export Pack | 4409140 | DLC | — | Catalogue |
| 12642 | Traveler's Bastion - Spirit Guardians Expansion | 2301380 | DLC | — | Catalogue |
| 12643 | Treasure Drop: Algae Valley DLC | 4018460 | DLC | — | Catalogue |
| 12644 | Treasure Drop: Coral Reef DLC | 4018470 | DLC | — | Catalogue |
| 12645 | Treasure Drop: Deep Trench DLC | 4018450 | DLC | — | Catalogue |
| 12646 | Treasure Drop: Open Sea DLC | 4018440 | DLC | — | Catalogue |
| 12647 | Trepang2 - Bladekisser DLC | 2615920 | DLC | — | Catalogue |
| 12648 | Trepang2 - Season Pass | 2656880 | DLC | — | Catalogue |
| 12649 | Trepang2 - Survival Mode DLC | 2615910 | DLC | — | Catalogue |
| 12650 | Trials Fusion Season Pass | 287330 | DLC | — | Catalogue |
| 12651 | Trials® Rising - Expansion Pass | 924181 | DLC | — | Catalogue |
| 12652 | Tribe Dash - Beginner's Pack | 2516370 | DLC | — | Catalogue |
| 12653 | Tricks, Treats and Mirrors - An EoG Supporter Pack | 3646500 | DLC | — | Catalogue |
| 12654 | Trigon: Space Story - Deluxe DLC | 1925020 | DLC | — | Catalogue |
| 12655 | Trillion: God of Destruction - Deluxe Pack | 543470 | DLC | — | Catalogue |
| 12656 | Trix and the Horny Tower - Adult Art Pack | 1521320 | DLC | — | Catalogue |
| 12657 | Trombone Champ: Unflattened - Celeste Song Pack | 4218420 | DLC | — | Catalogue |
| 12658 | Trombone Champ: Unflattened - Halloween Pack | 4076990 | DLC | — | Catalogue |
| 12659 | Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack | 3610400 | DLC | — | Catalogue |
| 12660 | Tropico 4: Junta Military DLC | 57696 | DLC | — | Catalogue |
| 12661 | Tropico 4: Megalopolis DLC | 205633 | DLC | — | Catalogue |
| 12662 | Tropico 4: Pirate Heaven DLC | 205632 | DLC | — | Catalogue |
| 12663 | Tropico 4: Plantador DLC | 57695 | DLC | — | Catalogue |
| 12664 | Tropico 4: Quick-dry Cement DLC | 57697 | DLC | — | Catalogue |
| 12665 | Tropico 4: Vigilante DLC | 205634 | DLC | — | Catalogue |
| 12666 | Tropico 4: Voodoo DLC | 205638 | DLC | — | Catalogue |
| 12667 | Tropico 5 - Map Pack | 306401 | DLC | — | Catalogue |
| 12668 | Trove - Arcanium Expedition Pack | 380231 | DLC | — | Catalogue |
| 12669 | Trove - Arcanium Triumph Pack | 2689510 | DLC | — | Catalogue |
| 12670 | Trove - Double Dragon Pack | 462920 | DLC | — | Catalogue |
| 12671 | Trove - Dynomighty Miner Pack | 807020 | DLC | — | Catalogue |
| 12672 | Trove - Eclipse Pack | 693160 | DLC | — | Catalogue |
| 12673 | Trove - Fast Fortune Pack | 658001 | DLC | — | Catalogue |
| 12674 | Trove - Gearcrafter's Pack | 3296310 | DLC | — | Catalogue |
| 12675 | Trove - Mega Menagerie Pack | 658000 | DLC | — | Catalogue |
| 12676 | Trove - Square Necessities Pack | 789530 | DLC | — | Catalogue |
| 12677 | Truck Driver - France Paint Jobs DLC | 1279711 | DLC | — | Catalogue |
| 12678 | Truck Driver - German Paint Jobs DLC | 1279712 | DLC | — | Catalogue |
| 12679 | Truck Driver - UK Paint Jobs DLC | 1279713 | DLC | — | Catalogue |
| 12680 | Truck Driver - USA Paint Jobs DLC | 1279710 | DLC | — | Catalogue |
| 12681 | True or False - Expansion Pack | 521850 | DLC | — | Catalogue |
| 12682 | Trump Simulator 2025 - Musk Expansion | 3609450 | DLC | — | Catalogue |
| 12683 | Trump Simulator 2025: MAGA People Simulator - Expansion | 4724060 | DLC | — | Catalogue |
| 12684 | Tryst: Survival DLC | 208470 | DLC | — | Catalogue |
| 12685 | Tunche - Supporter Pack | 1789240 | DLC | — | Catalogue |
| 12686 | Tung Tung Tung Survival - Supporter Pack | 4864670 | DLC | — | Catalogue |
| 12687 | Turbo Sloths - Expansion Pack | 2226040 | DLC | — | Catalogue |
| 12688 | Twin Mind: Nobody's Here DLC | 2224620 | DLC | — | Catalogue |
| 12689 | Twin Mind: The Deathly Trick DLC | 3101990 | DLC | — | Catalogue |
| 12690 | Tyranny - Deluxe Edition Upgrade Pack | 612491 | DLC | — | Catalogue |
| 12691 | Tyranny - Portrait Pack | 611370 | DLC | — | Catalogue |
| 12692 | UBOAT - Supporter Pack | 3129990 | DLC | — | Catalogue |
| 12693 | UEBERNATURAL: Indie Developer Guy - Supporter Pack | 4537620 | DLC | — | Catalogue |
| 12694 | UNDER NIGHT IN-BIRTH II Sys:Celes - Season Pass | 2441370 | DLC | — | Catalogue |
| 12695 | UNDER NIGHT IN-BIRTH II Sys:Celes DLC - 25 Announcer Characters | 2353330 | DLC | — | Catalogue |
| 12696 | UNDYING - Halloween 2023 Free DLC | 2644380 | DLC | — | Catalogue |
| 12697 | UNO™ - BRAWLHALLA COSMETIC PACK | 4093730 | DLC | — | Catalogue |
| 12698 | UNO™ - Shovel Knight Cosmetic Pack | 4502610 | DLC | — | Catalogue |
| 12699 | USA Nature's Trails Jigsaw Edition - Expansion Pack 1 | 3325910 | DLC | — | Catalogue |
| 12700 | USA Nature's Trails Jigsaw Edition - Expansion Pack 2 | 3328970 | DLC | — | Catalogue |
![Trainz Plus DLC - [TL] Bald Knob - Wynne Steam header image](https://cdn.cloudflare.steamstatic.com/steam/apps/3932320/header.jpg)
![Trainz Plus DLC - [TL] Crawfordsville - Clements Steam header image](https://cdn.cloudflare.steamstatic.com/steam/apps/4009800/header.jpg)
![Trainz Plus DLC - [TL] Pivdenni Stepy - UZ Steam header image](https://cdn.cloudflare.steamstatic.com/steam/apps/3609360/header.jpg)
![Trainz Plus DLC - [TL] Rainsville - Danville Steam header image](https://cdn.cloudflare.steamstatic.com/steam/apps/3321840/header.jpg)
