
When most bosses are dead, a replay (called a deathcam) of the boss' death is shown and the episode ends. Bosses are initially stationary and do not become active until they see the player. Unlike normal enemies, boss enemies are drawn from one angle instead of eight they are always facing the player, and so cannot be taken by surprise. Each episode has a different boss, who must be killed in the final mission to complete the episode. The player can score additional bonus points by earning a 100% kill, secret, or treasure ratio, or completing the level more quickly than average. Percentages for collecting treasures, eliminating enemies and discovering secrets discovered are displayed at the end of each level. Walls can be searched for secret passages which lead to caches of treasure, ammunition, and/or health refills. The players can collect treasures scattered throughout the levels to boost their score. The original version of the game allows the player to save the game at any point, while in most console versions the player must complete each level before saving the game. The player begins each episode with three lives, and can gain more lives by finding extra-life tokens or by earning 40,000 points. Like the previous game, the player can use stealth to kill enemies or escape without drawing their attention, however this trick best work with Nazis. A submachine gun and a rapid-firing chain gun, which all use the same type of ammunition, are also available. If the player's health falls to zero, the player loses one life and all his or her guns and ammunition, except a pistol with eight rounds and a knife. The player must fight guards, dogs, and other enemies while maintaining supplies of ammunition and health. Levels are completed by reaching an elevator that leads to the next level. Each episode features nine levels (or "maps"), which must be finished sequentially.
