Alexstein is a mod for registered Wolfenstein, made by Alex Arzola. It was released on May 28, 1999.
New levels are featured on the first three episodes, and a number of graphics have been changed.
Initially released on May 28, 1999 as a map set with new graphics, it was re-released in September that year with coding changes that included increased ammo, health and new episode names. Furthermore, the guards move at a much faster pace than usual. Some new sounds were included as well.