OpenTTD
The most active unofficial successor to r/OpenTTD!
...which is admittedly not saying much. We do require you to speak english when posting though but only for practicality, as long as you explain in english as well, you may post in any language you wish! It's just going to be easier for everyone that way. See also the german OpenTTD fediverse community for potential threads in german.
Please do not ask where to get NewGRFs, they are easily obtainable via the in-game content downloader (a.k.a "BaNaNaS" or "the fruit store") or TT-Forums and certain authors have expressed they will not allow downloads of graphics that they no longer provide support for by penalty of copyright law. The other side of the coin is otherwise explained in our "rules" thread. Please read the rules thread before posting or do not post.
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Terrain modifications and tunnels get real expensive real fast. Avoid it or keep it small in the early game.
Also, while goods pay better the longer distance you transport them, they pay less the longer time it takes. Some goods depreciate faster than others, there's a graph for each. So don't sit around on the station too long waiting for a full load of passengers.
Also diagonals are counted as longer distance than straight line, so 40 blocks diagonally will pay better than 40 blocks straight line, given the goods are not perishable.