Through The Portal is a scenario for the Mac version of Wolfenstein 3D by yyr, featuring 12 levels and odd effects.
An interesting mod, with some weird visual effects never before seen in Wolfenstein. 12 levels, 3 of them secret and 1 of them containing a glimpse of Hino Rei from Sailor Moon. This was actually used as an AOL contest, in which the grand prize was a copy of Barneystein 3D.
Download Through The Portal at yyr’s Page of Wolfenstein Insanity