Serious Sam 2 = Serious Sam 1
 

Hello there! Do you remember Doom and Doom2 exe file? Yes! they are the same.

Do you have a no-cd patch for Serious Sam: first encounter v1.05? Yes? And did you buy Serious Sam 2 and you would like to play without CD? Put the serious sam 1 no-cd exe file in the Serious Sam 2 .\bin directory (back up the original exe file!!).

That's it!!! Great!