Version 1.2.0 adds rail-joint sounds and updates the cab controls, fireman responses, and train choices. • Rail-joint sounds follow distance traveled and each axle crossing, so you can hear the rhythm of the wheels while coasting. We also adjusted C12 exhaust. • Clearer instruments and readouts include a central reverser handle you can turn directly. Acceleration is shown in km/h/s, and grades and distances are easier to read. • Sanding now uses an on/off toggle. We also revised braking strength and made operation sounds quieter. • Each locomotive offers six train choices, including light engine. Compare D51, C62, and C12 with the same three or five coaches. • All three fireman skill levels anticipate grades and adjust firing sooner. • We refined wheel and rod appearance and reduced drawing and audio processing overhead at high speed and 4× speed. • We revised the C62 and C12 operating guides and fixed resource readouts, distance counting, and C12 coupling and uncoupling behavior.

• Restored landscape-only display on iPhone, including both iPhone Duo displays. iPad continues to support portrait and landscape. • Fixed overlapping driving guidance and the coupler close-up in narrow C12 shunting views. Scroll to reach content that does not fit on screen.

• Added support for the outer and inner displays of iPhone Duo, with layouts that adapt when the device opens, closes or rotates. • Fixed detached train weight remaining on the C12 after the coupler lock was lifted. Detached cars no longer add hauling load while the knuckle opens.

• Fixed a mismatch between train movement and driving-wheel rotation at low speeds and when stopping on grades. • Fixed the regulator bar shifting at 100% opening. • Improved the Joban Line cab layout to keep the current and upcoming gradients and the distance to Toride readable. • Kept the completed-coupling display visible for about three seconds and improved wheel movement at coupling contact.

• Shunting distance now totals all actual locomotive movement in both directions. • Strengthened light-engine braking, doubled its application and release rates and added Prepare coupler in the cab within 20 m of parked stock. • Enlarged the coupler plan view and removed the section view. Gentle coupling to stationary stock now produces a short stop depending on weight and approach speed. • Added 26.34km from Tsuchiura to Toride for C62, with an original gradient diagram, 41 sections and a driving guide based on recorded station positions and gradients. The cab now shows the remaining distance to Toride. • Light-engine choices now show service mass. Enlarged the Privacy, Help and Extra content links. • Added the historical JNR shunting speed rule (generally 25 km/h, 45 km/h for a locomotive alone) and its source to the operating guide. • The menu now centers on D51 driving conditions. C62 and C12 choices appear after purchasing the optional expansion pack. • Added a task-specific completion checklist to the yard map, showing met and unmet conditions, the next required step and any remaining conditions when ending early. • Completed coupling now applies the brake automatically, with deceleration following the rise in brake-cylinder pressure. • The C12 yard brake now acts on the whole consist, with brake force based on locomotive and hauled mass. Application and release take 10–50% longer depending on consist length. • Coupler close-ups now appear over the driving wheels only within 5 m and disappear when coupling completes. Removed the upper position, distance and coupler bars while keeping the wheel display size unchanged. Gauges, controls and wheels keep the original D51 sizes; the space above the wheels shows the target, direction and remaining distance. Control names wrap and resource readouts adapt to the available width. Shunting results omit the run curve. • Added separate recorded sounds for lifting the lock and completing coupling. Adjusted the C12 exhaust sound. • Revised the cast coupler head, knuckle and hinge presentation while preserving contact, rotation, locking and withdrawal behavior. • Added a one-time expansion pack combining C62 driving, C12 driving and C12 yard shunting. • Added passenger consists for C62 and short consists for C12, with locomotive-specific wheels, cylinders, mass and inventories. • C12 shunting now couples automatically on physical contact at 2.5 km/h or less, with moving knuckles and locks and a synchronized clank. • Added varied yard tasks and assembly/stabling of 12 coaches (480 t) or 30 wagons (750 t). • D51 and C62 passenger coaches share the same representative loaded 40 t per car. • Kept the brake control on/off while adding gradual application and release driven by brake-cylinder pressure. • Added braking-strength bars, quieter airflow-based sounds and a familiar sound as release nears completion. • Cylinder drains now discharge water according to cylinder pressure and the water remaining. • Wet drains produce a fuller cloud, changing to a thin steam jet as the water clears. • Sand now leaves the pipe tip towards the wheel with a slight downward curve. • Added heat loss, condensation and re-evaporation to the steam-chest model. • Fixed an abrupt change in the cutoff readout near the reverser's center position. • Added water discharge rate and total drained water to State, and revised the operating guide. • Placed steam-chest pressure on the left and boiler pressure on the right. • Reduced redundant display updates and reused fixed wheel geometry and gauge dials.

• Added a steam-chest pressure gauge to the cab. • Added detailed reading on departure, coasting, resuming power and other steam driving techniques. • The firebox now keeps a faint red glow between shovels. • Synchronized simulation updates and machinery animation at 60Hz, with improved pause and resume transitions. • Made sand jets and grains falling onto the rails easier to see. • Refined medium- and high-speed exhaust sound and the short fade after releasing the whistle. • Improved iPad portrait and landscape layouts and compact cab spacing. • The high-skill fireman now fires earlier as steam demand rises. • Revised labels and explanations. • Revised air and steam flow and exhaust timing during coasting to better model reverser and bypass effects.