''Nitemare 3D'' was a haunted-house-themed FirstPersonShooter for DOS and Windows 3.1 based on ''VideoGame/{{Wolfenstein 3D}}'' and released in 1994. It was nominally a follow-up to the ''HugosHouseOfHorrors'' series of adventure games, but instead of solving tricky AdventureGame puzzles, you just shoot stuff. Well, and collect keys and cards needed to advance to the next level. And find hidden passages. And solve the occasional BlockPuzzle. Expanded greatly on the concept, with the aforementioned features as well as an on-screen [[LevelMapDisplay minimap]] showing the nearby areas you've visited as well as [[EnemyDetectingRadar any enemies in the vicinity]].

Still has a cult following, due in part to being continually updated for compatability with the latest version of Windows.

!!This game provides examples of:

* BlackoutBasement: One sequence in Level 1-7 has the storm blow out the fuse.
* BlockPuzzle: Possibly the first FPS to use these.
* BloodlessCarnage: In contrast to its famous predecessor, enemies don't even fall down dead (except for bats); they either simply vanish when killed or morph into tombstones or... flower pots.
* BookcasePassage: Tons of secret sliding panels, which, aside from the ''actual'' bookcases, are impossible to tell from the regular walls without your handy secret-panel-detecting eyeballs.
* CallBack: To the ''Hugo'' series -- the first safe is unlocked with the combination [[spoiler:333]].
* TheComputerIsACheatingBastard: Enemies that shoot can shoot around corners you can't even ''see'' around. Possibly just a side effect of poor programming, though.
* DemBones: Skeletons that throw flaming bones, or something.
** They toss torches, though if you're close enough to make that out when they do that, you're about to take a lot of damage.
* EnemyDetectingRadar: Collecting the floating crystal balls fuels an overlay for your LevelMapDisplay that shows enemies in red.
* FamilyFriendlyFirearms: The game starts you off with a plasma gun despite the current-day setting. Subverted in level three, however, when you find the pistol.
** In keeping with the classic horror theme, though, it uses silver bullets. There are also gun turrets in level seven that you must get past.
* FrankensteinsMonster
* HealingPotion
** Also the Pentagram of Good Heath, which restores you to full health, always.
* {{Hitscan}}: The advantage of the pistol. Enemies with ranged attacks are hitscan-based as well. Even the skeletons.
* HundredPercentCompletion: Hitting TAB brings up a chart of how many enemies there are left to kill and how many secret panels have yet to be found.
* KineticWeaponsAreJustBetter: The plasma guns and magic wand all fire relatively slow-moving projectiles. The pistol [[{{Hitscan}} hits its target instantly]] (albeit with more of a delay between shots and the inability to blow the exploding walls), making it a godsend for enemies whose ranged attacks do likewise.
* LevelMapDisplay: The aforementioned map in your HUD, which drains a meter powered by giant floating collectable eyeballs.
* LivingStatue: Two of the enemy types are statues (referred to as "gargoyles" in the game data) that come to life when the player gets close enough.
* LockedDoor: Every wooden door is initially locked, and you will need one of up to four color-coded keys (depending on the level) to open them. The final door of each level also requires an ID card to unlock, and if there are any wooden doors in the level, you can bet that card ''will'' be behind one of them.
* MadeOfExplodium: Some of the specially-marked walls.
* {{Mummy}}
* ThePowerOfRock: In Level 1-9, switching on a radio makes enemies dance out of your way. Good thing, too, because your weapon jams just as you enter that room.
* SecretLevel: Level 1-5.
* {{Shareware}}: Just like ''Wolfenstein'', the first ten-level "episode" was free, and registering got you the other two.
* SoundCodedForYourConvenience
* StandardFPSGuns: Averted. There is a pistol, but it's the last of the three weapons you find. The others are a Plasma Gun (which kinda fits as a first weapon but only as it's handgun-shaped) and a Magic Wand.
** SortingAlgorithmOfWeaponEffectiveness: Also averted. Each of the three weapons are more effective against certain enemies and less effective against others. [[AllThereInTheManual According to the manual]], the Wand is better against Witches and Sorceresses, while the Pistol is loaded with silver bullets and thus better against Vampires.)
* UnwinnableByDesign: Most of the time, you'll want to kill off any enemy around as soon as possible, but in a select few situations you'll need to coax enemies into blocking off certain passageways. Killing those enemies too soon makes the level unwinnable.
* WallMaster: The aforementioned {{Living Statue}}s.
* WhipItGood: The weapon of choice for the stone-wall living statues.
* WickedWitch: Two standard Halloween-style witches (white and black) and one blue-robed sorceress, referred to in the game data as "Vampira", "Zelda", and "Mrs. H" respectively.