Enter one of the following codes to activate the correspondingcheat function. A sound will confirm correct code entry.
Type in eger during gameplay.
During gameplay, type iddqd. You will now have invulnerability and unlimited ammo.
Go to the end of the first level. Instead of going through the exit, turn right and open a secret door in the corner of the wall. Then, turn 90 degrees to your right to open another secret passage. At the end, you will find the elevator to level 10.
The secret levels are just another level which hasbeen made harder to find than others. To get to a secret levela special elevator (in appearance they look like a normal elevator)must be taken from one of the normal (non-secret levels). Specialelevators are hidden. There is one secret level per episode. Aftera secret level is completed, the exit elevator will provide tothe next normal level to be completed.
The secret rooms are like any other room except theyare accessed by a "secret passage" (not really a door).There are certain wall panels which can be pushed. The wall willthen slide back revealing a passage to another room. Secret roomsare usually used to store treasure, keys, food, first aid andammo packs and more powerful guns.
Although there are no strict guidelines to where a secret roommight be, there are subtle hints on where one might be positioned.Since the maps in the game are true (i.e. they are not warpedspace), a block of wall which is thick and houses no standardrooms (operated by normal sliding doors) could potentially housea secret room. First try the obvious places on the walls (e.g.Hitler paintings, Nazi banners and other obvious wall decorations).Some secret panels are in the corners of a room, others in themiddle of a wall (midpoint of a wall in a standard room). Thereare also a few between two objects, such as two plants or twobarrels positioned against the walls. Secret panels may also befound on walls in straight line extending from an object (suchas an overhead lamp). Some secret rooms have secret rooms withinthem. Sometimes secret movable panels can be moved to block eachother.
To see a photo of the development team, press B when the iD Software logo appears while the game is starting up.