Hidden Spots Trains

Train Valley 2

Hidden Gems. Users can provide useful insights as they add the creative level outlining the polish to intrigue and solve the puzzle.

Why It’s Fun. Its one bid feature. Time management with the logistical structure however well optimised with visuals.

Railroads: Online!

Hidden Gems. Thanks to endeavours left unparalleled, such routes and alternatives could be searched in extensive maps.

Why It’s Fun. It’s Multiplayer & depicts simulation. Hence, train mechanics were built in detail.

A-Train Series (Artdink).

Hidden Gems. Consider it, foolish features present; but that is only on the surface for real stratagem lies beneath the retro.

Why It’s Fun. Sim city and railways management at the same time.

Puzzle-Based Train Games

Mini Metro

Hidden Spots. The real challenge lies in earning a high score striving for a more optimised metro system efficiency.

Why It’s Fun. Efficiently designed but very complicated in strategy as cities expand.

Railbound

Hidden Spots. Advanced puzzles in addition to secret levels to enhance your logical thinking.

Why It’s Fun. Computers don’t get bored so, an amusing hand-painted style and comforting gameplay.

Trainyard (Mobile)

Hidden Spots. There are a number of correct answers for ways to complete the puzzles which are not commonly used.

Why It’s Fun. The phrase classic in the game Design captures its essence. However uncommon but quite simple.

A Furious First-Person Perspective of Trains

Yaassss it’s Train Sim World Series

Hidden Spots: Word to landscaping views with an actual Easter egg.

Why It’s Fun: Ultra reality in a train along with God’s views.

The Final Station

Probing hollowed stations to scour such treasures would only result in certain resources and also the lore behind.

What Makes it Enjoyable: Combines elements of survival, searching, and train journey in a post-apocalyptic setting.

Tracks – The Train Set Game

Hidden Locations: Complete control in creating and expanding tiny captivating layouts.

What Makes it Enjoyable: The virtual version of a wooden train set where there are lots of ways to build and customise.

Retro Train Games

Sid Meier's Railroads!

Hidden Locations: Planning connections and discovering yet another way to control the board.

What Makes it an Enjoyable Activity: An old-fashioned tycoon game but a unique insight for the trains.

Transport Tycoon Deluxe

Hidden Locations: Attempt different custom maps made by other users for a more exciting challenge.

What Makes it an Enjoyable Activity: A classic sandbox game for the fans of transportation.

Railroad Tycoon 3

Hidden Locations: Maps with economic shortcuts and nasty variables hidden beneath them.

What Makes it an Enjoyable Activity: Economic depth and satisfying mechanics for making railroads.

Unique Train-Themed Indies

Unrailed!

Hidden Locations: The application of pdg means that there will always be a new sneak peek of the route to be taken.

What Makes it Enjoyable: Quick gameplay featuring multiple players in which all cooperate to lay the tracks.

Spiritfarer

Hidden Locations: The boat system which is a train-like structure travelled to disconnected islands with unique stories.

What Makes it a Fun Factor: Has life simulation blended with narrative adventures emphasising emotional appeals.

Factorio

Hidden Locations: Create hardcore/professional train networks for resources self-sustaining use.

What Makes it a Fun Factor: Great for people who love optimisations and logistics.

Let me know if there's a certain platform or a certain style to be followed for suggestions