When it comes to first-person shooters, you just can’t beat Doom. Sure, we’ve seen a ton of innovation in the gaming world in the 25 years since the title’s original release, but no single game has been able to come close to it in terms of popularity or ubiquity. Famously installed on more PCs in 1995 than the then-brand-new OS , Doom makes the major players in today’s market look like total flashes in the pan. Very few will remember Fortnite or PUBG years from now, but gamers will still be populating online forums with talk about Id’s seminal shooter for decades to come. Those other games may have merit, but i🌼t doesn’t seem like either of them will be surpassing Windows 10’s install base anytime soon.

Though it’s been combed over relentlessly by dedicated fans, there are still a ton of secrets in games bearing the Doom name that casual players aren’t aware. Just about everyone knows how to access all of the hidden areas in E1M1, but the demon-infested world of Doom runs so much deeper than that.

It’s not easy being a green space marine, but, armed with an arsenal of crudely-rendered sci-fi weaponry, the armies of the underworld won’t stand much of a chance. Plus, with a little extra kn🍨ow-how, the pixelated hallways of the UAC’s martian colonies will prove to be more than navigable—just be sure to stock up on BFG ammo.

30 Yeah, You Can Time Travel Back To ‘92 

Industrial Zone—the fifteenth map available in Doom II’s campaign—harbors a secret which fans of , a precursor to Doom, will love. Players who managed to stumble upon the level’s secret exit will be taken to one of the few secret levels available in the game. This one, however, is notable for its direct homage to Wolf 3D. Textured and organized very similarly to Id’s previous title, Map 31—or Wolfenstein, as it’s more popularly known—is a shockingly detailed conversion of the original game into Doom’s engine. Id even took the time to implement the famous German enemy sp💞rites.

29 Doom 2016 A Candy C💧♒rush Clone In It?

Doom games are well-known for their excessive nature and relentless action, but 2016’s series reboot introduced a new method of demon slaying. If the player accesses a seemingly innocuous terminal situated near the end of the Lazarus Labs level, they will be presented with a pretty tongue-in-cheek Doom themed version of Candy Crush. Well, it doesn’t have to be Candy Crush, per se, as it plays similarly to pretty much any match-three-tile game out there. It’s a fun distraction, though, and there’s even ♚an in-game achievement in it for you!

28 🍌 When Doom Makes Fun Of Itself 🌄

Remember that weird little arcade game from Doom 3? A clicker game before the concept existed, the goal of Doom 3’s game-within-a-game was—you guessed it—to punch turkeys. Though it couldn’t possibly have 🐭held anyone’s attention for more than a few seconds, Bethesda saw fit to include a lone Turkey Puncher arcade cabinet in Doom 2016’s Advanced Research Complex. Bullheaded players may have breezed right by the machine, but dedicated turkey terminators managed to sniff it out.

27 You Can Make The Demons Fight Eachother ജ

If you’re finding the hoards of the underworld to be a bit too challenging late in the game, there’s a pretty good chance that you could trick some enemies into fighting each other. is a stable of most Doom games, and it can be extremely helpful to those low on health or ammo. Sometimes, if an imp or 🌼zombified soldier take a fireball to the back, they’ll likely pinwheel around and return fire regardless of demonic allegiance. There is a demon hierarchy, however, as some lesser-beings know better than to pick fights with tougher opponents.

26 ꦏ🍎 Secret Stage In Doom 2016

 This isn’t exactly a major secret given that 2016’s Doom reimagining has been out for over two years at this point, but explorative players have come across old-school, maps scattered throughout the game. Much akin to the dream sequences available in 2014’s Wolfenstein: The New Order which transported the player to a world very much reminiscent of 1992’s Wolfenstein 3D, Doom 2016 allows players to step back through time and briefly pay homage🔯 to the roots of the FPS genre.

25 Hacking The🎃 Original For 🔥EASY Mode

Doom is pretty well known for foregoing the traditional easy through hard difficulty modes in favor of instituting some more memorable game-mode monikers. From “I’m too young to” the easiest setting, to “Ultra-nightmare,” the game’s most merciless mode, Id did more than implement standard difficulty barriers. However, in the vanilla version of the original Doom, it was possible to set the game’s , which meant that no enemies would spawn at all. For𝔍 those looking to speedrun the game, this may be a pretty solid option, provided that you🐎 aren’t a fan of having fun.

24 The Soul Cub💫e Is Back

Doom 3 players will likely remember the, which was an incredibly unique late-game weapon which allowed players to literally steal health from their enemies. It was slightly creepy, and it would actually whisper “use us” when charged and ready to be deployed, but that hardly hinders what was probably one of the most useful weapons in the game aside from the BFG. Though it can’t be picked up, this disturbing artifact can actually be found in Doom 2016, and it’s🥀 actually 🔯hidden in the same room as the Demon Destruction minigame.

23 🤡 𝔍The Terrifying Doom 3 Mirror Secret

Another already infamous secret, Doom 3 put players on edge early as a seemingly found early on in the game played host to a tremendously terrifying trick. Located in an area not far from the room in which the player encounters the first zombified enemy, there isn’t really a purpose to this room other than the jumpscare it contains. Staring at the mirror for a few seconds will cause the screen will turn red and the camera to zoom in on the Doom Marine’s face as it quickly appears tღo melt off. Spooky sไtuff.

22 Get The Su꧃per Shotgun𓆉 In Doom 2016

Though it will likely land in the hands of the player at some point during Doom 2016’s lengthy single-player campaign, the can actually be located in the Argent Energy Tower in the room in which Olivia Pierce and the Argent Accumulator are encountered. Since the super shotgun—which is a nod to the weapon of the same name introduced in Doom II—shares an ammo pool with the regular combat shotgun, you’ll likely just stick with the more powerful of the two. This new, double-barreled weapon packs quite a punch, and it’s likely to widen the eyes of any hardcore Doom fan.

21 Programming Error In Your Favor — Collect🧸 20 Health

Anyone who spent too much time playing the original Doom title as a kid likely still has the visage of the Doom Marine emblazoned into their memory. Much like B.J. Blaskowitz, the extremely pixelated hero of Wolfenstein 3D, Doom displays the protagonists’ face at all times in a small box contained within the games HUD. While a depiction of a character’s reaction to certain in-game events was a neat inclusion, a very rare could be triggered if the player managed to gain 20 or more health while simultaneously sustaining damage; the event’s rarity the result of a s🔥light programming error.