This is not really about trains. The train is an interlude connecting 5-minute levels of exploration and twitch shooting. Exploring is quite fun, but the gameplay loop is repetitive; it's basically do the same level on repeat for 4 hours. What little story there is unfolds through character dialogue on the train sections, but during that time you also have to feed them, supply health packs and fix the train through minigames, so you can't read the story and stop the NPCs from dying. The dialogue feels like it's been through Google Translate & the ending is very unsatisfying; you think the story is going to be explained, and then it just ends abruptly with all questions left unanswered.