Wolfenstein 3D

Wolfenstein 3D is a first-person shooter video game developed by id Software and published by Apogee Software and FormGen. Originally released on May 5, 1992 for MS-DOS. Each episode features nine levels (or "maps"), which must be finished sequentially. Levels are completed by reaching an elevator that leads to the next level. The player must fight guards and other enemies while maintaining supplies of ammunition and health. The player begins each episode with three lives, and can gain more lives by finding extra-life tokens or by earning 40,000 points. The players can collect treasures scattered throughout the levels to boost their score. Walls can be searched for secret passages which lead to caches of treasure, ammunition, and/or health refills. Percentages for collecting treasures, eliminating enemies and discovering secrets discovered are displayed at the end of each level. The player can score additional bonus points by earning a 100% destroy, secret, or treasure ratio, or completing the level more quickly than average.