Tunnels

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Author: zai4z

Last revision: 12 Jul, 2025 at 22:10 UTC

File size: 89.17 KB

On Steam Workshop

Description:

This mod allows for late game movement and city connections through mountains

Upon unlocking dynamite, workers will gain the ability to enter mountains and construct tunnels

Tunnel
Allows land units to traverse a mountain tile as if it’s a hill, without taking attrition damage
Takes 4.5x longer to build than a railroad (17 turns on normal speed)
May be built outside your territory
Costs 1 gold per turn
+25% defence
Will also have a road when built

You can replace the road with railroad when it’s researched. Tunnels, and roads on tunnels, can’t be pillaged

If you want to remove a tunnel, remove the road/railroad, and the tunnel will also be removed

You may notice the game reloading immediately after loading into a saved game… this is intentional and necessary to update terrain graphics

The AI won’t build tunnels themselves, but they will use any existing tunnel, just as a human player would

Workers can build the tunnel anywhere, however, if you attempt this, no tunnel will appear on the tile. Tunnels will only be completed on valid tiles (non-tunnel mountain tiles). Not flatland, hills or natural wonders

I have also removed the ability to complete road/railroad on mountains without a tunnel

These are fixed if you’re using my other mod: Various Mod Components, but it is not required

Does NOT require a DLL, and therefore can be used on multiplayer or with DLL mods