As with most of the great shareware titles of the 90s, I played the free episode of Wolfenstein 3D a gazillion times but never bothered to buy the complete package. Once again with thanks to GOG.com I have been able to finally complete in its entirety. This is the progenitor of first-person shooters and the basic game mechanics are still pretty solid. Its main problem is that of repetitiveness. There are only four kinds of enemies to fight. That isn't including the bosses at the end of every episode which all have a unique sprite and some even have an elaborate death sequence:
But even those bosses all kinda fight in the same manner.