Why the U4 instead of the U2? SubwaySim 2 developers explain their unusual decision!

With the new DLC, the team wanted for the first time to integrate an additional route directly into the already existing Berlin map. Instead of building a new line on a separate map, the existing game world was actually meant to be expanded.

And this is exactly where the U4 came into play. For this first attempt, the developers deliberately did not want to choose a huge route, but rather a compact line on which the necessary technical processes could initially be implemented in full within manageable limits.

The only four new stations were therefore apparently neither a coincidence nor simply the result of aiming for the smallest possible DLC scope. The U4 was, in a sense, intended to be the first practical test for a new way of expanding SubwaySim 2 in the future.

That did not mean the development effort was small, however. According to the team, many hundreds of hours of work went into the implementation. In addition to the four stations, the complete route and tunnel infrastructure, individual signs and materials, passenger information, timetables, scenarios and numerous other details had to be created.

At the same time, the opportunity was used to further develop technical areas of SubwaySim 2. These include, in particular, a new signalling system and dynamic tunnel lighting. The U4 was therefore not just a new playable route, but also a kind of technical testing ground.

The decisive point, however, only comes afterwards: According to the developer, the direct expansion of the existing map worked.

This means the team achieved exactly what was initially meant to be tested with the U4. In principle, new routes can be connected directly to the already existing Berlin game world, rather than necessarily being created as separate maps.

That players asked specifically about the U2 is hardly surprising. It would be considerably more extensive than the U4 and would accordingly offer significantly more new track. However, a U2 expansion is not announcedin the current statement. The line is merely cited by the developer as an example of a frequently asked community question.

The team is deliberately leaving open which route could actually follow next. They do not yet want to reveal what possibilities the successful integration of the U4 will open up in the future. The technical foundation for this is now in place, however.

This also puts the choice of the initially seemingly inconspicuous U4 in a different context. Instead of immediately implementing the largest possible line, the team first tested whether the desired concept would work reliably at all. Only after this step was completed could more extensive expansions theoretically follow on the same basis.

The real question is therefore perhaps now less why SubwaySim 2 only got the U4 – but rather, what the developers intend to do with Berlin next on this foundation.

Would you still have preferred to get the U2 directly? Or do you find the approach understandable, testing first with a short line whether the existing Berlin network can actually be expanded without problems? Which line should follow next?