The Underwater Biome is a bonus biome of the sorts that can be entered using any of the secret mineshafts that are hidden across the first 3 biomes. For each biome, one mineshaft may spawn randomly on level 3, 4 or 5. Starting from level 6, one is guaranteed to spawn on level 5n+1. When you see a mineshaft surrounded by the streams of a nearby waterfall, you can build tracks there and connect to the lone track within the mineshaft. Your train will then speed up towards the mineshaft, then enter a transition phase into Underwater where the train is slowed and a flashing warning symbol appears over your train's engine. | The Underwater Biome is a bonus biome of the sorts that can be entered using any of the secret mineshafts that are hidden across the first 3 biomes. For each biome, one mineshaft may spawn randomly on level 3, 4 or 5. Starting from level 6, one is guaranteed to spawn on level 5n+1. When you see a mineshaft surrounded by the streams of a nearby waterfall, you can build tracks there and connect to the lone track within the mineshaft. Your train will then speed up towards the mineshaft, then enter a transition phase into Underwater where the train is slowed and a flashing warning symbol appears over your train's engine. |