Screenshot coming soon.
The Train Hideout is the Frye twins' moving headquarters in Syndicate, a steam train its driver Agnes MacBean calls Bertha. You win it from the Blighters in the Whitechapel gang war, and it keeps running between London's stations while you plan, craft, shop and collect the Rooks' income.
Agnes ended up working for Rexford Kaylock after her disguise as her father was found out. Kaylock bet the train on the final Whitechapel gang war, and the Rooks' win handed it to the twins along with Agnes's services.
Train Hideout stories include Stalk the Stalker, where Nigel Bumble joins the crew, Hullo Mr. Gatling, where Jacob defends the train with a stolen Gatling gun, and Runaway Train, where Evie helps stop it after an engine fire. In The Last Maharaja, Blighters hijack it at Southwark and the twins win it back in Off the Rails.
The locomotive changes as you progress; one upgrade gives it a nameplate reading Herdwicke, even though Agnes still calls it Bertha.
Carriages
Horse-drawn carriages are the fastest way across Syndicate's London, and the twins hijack them whenever they need one. The twins drive them in chases, races, escort jobs and fights on the move, and Rooks carriages join the traffic once you buy the right gang upgrades.
Trains
Steam trains run between Syndicate's London stations, and you use them to get around the city, fight on their roofs and rob them. Railways appear for the first time in the series in this game, and the Rooks hold up money trains to fund the fight against the Templars.