No offense, but I never seen any commercial tycoon to come even close to amount of features and flexibility built into OpenTTD. Since this is kind of game you usually spend thousand of hours playing during gameplay you usually get that "would be cool if there was feature X here" feeling. And OpenTTD actually have almost every feature you can imagine. And amount of polished mods and availability of damn smart AI for the game is amazing addition.

So I kind a skeptical. Is the game you recommended actually allow to build complex railroads like OpenTTD does?