When comparing Simutrans vs Freedoom, the Slant community recommends Simutrans for most people. In the question“What are the best open-source games?” Simutrans is ranked 33rd while Freedoom is ranked 38th. The most important reason people chose Simutrans is:
Each product has a chosen destination and they will only use your company if you deliver them where they want.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Passengers & goods have their own travel destinations
Each product has a chosen destination and they will only use your company if you deliver them where they want.
Pro Multiple paksets
There are multiple graphic packages to choose from, each with different dynamics. So even though you have mastered one pakset you can have a different gameplay with another.
Pro Cross platform
Available for Windows, Mac, Linux & Steam-OS.
Pro Available through Steam
Simutrans is available through Steam for those who prefer automatic updates and game management through Steam.
Pro Transportation
For fans of transportation games it has lots of vehicle options and things to transport. The multiple graphical packages also mean a, kind-of, multiple games in one, as each graphical package can be completely different from the others.
Pro Multiplayer
Multiplayer support still has bugs and disconnections happen, but it works and is easier to setup with version 120.3 and up. It also allows you to setup servers without announcing them to other players, though that requires manual work.
Pro Map customisation
The map has multiple customisation options, like map size, climate zones, terrain 'roughness' and number of rivers, cities, industries and tourist attractions, & more.
Pro Modding
Creating new objects is not too hard, as long as you have some drawing skills you just need a text file with some parameters and then you can compile it to enjoy. Some paksets even rely on rendering from 3D objects.
Pro Community
Even though the game is old the community is active and open to developers and modders who want to improve the game. Decisions on how the game evolve also accept the decision of the majority of the community.
Pro More complex version called "Extended" for hardcore gamers
A fork of the project called Simutrans Extended extends the standard game with more complex and realistic features for extra complexity and realism for those who like hardcore gameplay. The fork is available in their official forums.
Pro The Doom feeling without the proprietary data files
Pro Thousands of available mods
Pro Easy mod creation
Making new levels and even gameplay mods is fairly easy and requires no programming knowledge.
Pro Easily moddable
You can apply mods others have made in a straightforward fashion. Find a mod you like (either from a quick google search or checking moddb for some) and the individual mod pages have a "tutorials" tab that you can use to figure out how to install it. It differs from mod to mod, but in most cases, it's fairly simple.
Pro Well documented modding possiblities
There are numerous tutorials providing detailed help with the modding and wikis providing extensive information on all aspects of the game