If you're just looking for the latest SRB2 installer as of 20 years ago, check it out here!
You wanted some WADs, you said. We will give you WADs, we decided. Grab them here!
Here are installers for all the SRB2 versions currently released (excluding 0.90, as Sonikku has kindly told me not to make that embarassing version public!). Also, do be aware, NT users! You CANNOT use SRB2 Halloween 1.0 and above since they only run in a DOS environment, thus requiring DOS (which I doubt you have now!), or Windows 95/98.
Music and Sound
Are you insane for some music from this game? Don't worry, we've got you covered, go here for a large selection of MIDIs and WAVs.