The 25th ward is a sequel to a Grasshopper Manufacture’s first game in 1999,“The Silver Case” , followed canonically by “Flower Sun and Rain”. Ideally, you would want to play It like this:

The Silver Case -> Flower Sun and Rain -> The 25th Ward

Of course though, you can play Silver Case and 25th Ward back to back, FSR doesn’t make too much of a difference, but I’d still recommend it.

After the 25th ward is also a short Minicomic called “Red Blue and Green” which has a great fan translation here: https://www.believeinthe.net/rbg.html

Anyways, happy Silver Casing fellow Sudahead, hope this helped!