13. There were countless unlockables in the game. They ranged from new weapons to new game modes. Just how could they be legitimately unlocked?
From Quiz Forgotten Gems: "Duke Nukem: Zero Hour"
Answer:
By beating a boss, finding all secrets, finding all babes, or killing all enemies in a level.
All levels, other than boss battles, featured a multitude of criteria to complete. The main criteria was, of course, to get through the level. A side category was to kill all enemies. In some levels, simply doing that unlocked some cheats. Another criteria was to find all of the secrets in a level. Some were easy to locate, while others were truly a challenge. Finding the babes in a level also challenged one's patience, but the cheats rewarded never disappointed. Killing a boss usually, but not always, awarded a cheat to the player. The game did have two secret levels, but did not give the gamer cheats just for discovering them. The first one could be unlocked in the first post-apocalyptic level. Instead of activating the radio, the player could jump onto the top of a hidden building and proceed to a hidden water-level, an ultra frustrating one might I add. The second hidden level could be unlocked if the player located all of the scattered time machine parts before the 1888 Castle level.
Thanks for playing and if you have a Nintendo 64, try checking out this long-forgotten gem!