The motherboard had nothing but the case usually had a speaker just to make a "beep" sound. I had to play Wolfenstein with that shit because my dad didn't have a sound blaster until he also got a CD-ROM drive to play Doom since he could only find a copy on CD and not floppy disk.
And even now, a SoundBlaster32 is better than the in-built audio stuff motherboards do have. Though it's not worth getting one just for games.