Endless Nightmare 4: Prison is the fourth installment in the popular horror game series developed by 707 INTERACTIVE, taking players on a terrifying journey through a ghost-infested penitentiary. Released as a follow-up to the successful previous chapters set in a home, hospital, and shrine, this latest addition continues the tradition of combining atmospheric horror exploration with puzzle-solving and strategic combat. As someone who's spent countless hours navigating the dark corridors of this frightening facility, I'm excited to share comprehensive insights to help you survive this chilling adventure and uncover all its secrets.
Endless Nightmare 4: Prison is a first-person survival horror game set in a haunted prison overrun with ghosts and monsters. The game follows Scott Boyd, a former US Marine Corps sergeant, whose life spirals into tragedy after returning from service. Through a series of devastating personal losses—including the death of his wife and son during a pandemic and his brother's suicide—Scott finds himself on death row for killing police officers. Just as he's about to be executed by electric chair, something mysterious happens, and he finds himself alone in the prison, beginning his desperate fight for survival and redemption.
The horror gameplay in Endless Nightmare 4 combines exploration, puzzle-solving, and resource management. You'll need to carefully navigate the prison environment, searching rooms for useful items while avoiding or confronting the paranormal entities that roam the halls. The movement controls utilize a virtual joystick for your left thumb to navigate and the right side of the screen to look around—a standard but effective setup for mobile horror games.
What makes the exploration particularly challenging is the deliberate movement speed, which some players find frustratingly slow. However, I've found this actually enhances the tension when a ghost suddenly appears around a corner. The atmospheric horror is further amplified when playing with headphones, which I highly recommend for immersing yourself in the chilling sound design.
The survival mechanics offer players multiple approaches to dealing with threats. You can:
I've found the stealth approach most effective in the early game when resources are scarce. The hiding system works particularly well when you've alerted a ghost—quickly ducking into a cabinet can save your life, but timing is critical as monsters will check nearby hiding spots if they saw you enter.
707 INTERACTIVE: Fun Epic Casual Games is the development studio behind the Endless Nightmare series. Based in Hong Kong, they've focused on creating mobile horror experiences that rival console games in atmosphere, if not in scope. Their approach balances jumpscares with psychological horror and puzzle elements, creating a more varied experience than simple "haunted house" mobile games.
The development team actively seeks community feedback through their Facebook page and Discord server, with regular updates addressing player concerns—a commendable practice I've noticed over the past two years following the game.
While Endless Nightmare 4: Prison is part of an established series, it tells a completely independent story. This approach makes it accessible to newcomers while still offering familiar gameplay mechanics to series veterans. Each game in the series explores different horror settings (home, hospital, shrine, and now prison), but maintains consistent core gameplay elements like puzzle-solving, exploration, and combat.
What distinguishes this fourth installment is its more grounded, reality-based story approaching themes of grief, despair, and redemption—adding emotional depth to the horror experience.
After exploring every dark corner of this game, I've identified several standout features that make Endless Nightmare 4: Prison a compelling horror experience for mobile gamers in 2025.
The game's exquisite 3D art style delivers a realistic horror visual experience that's impressive for a mobile title. The prison environment is meticulously detailed with peeling paint, rusted metal, and abandoned personal effects that tell silent stories about the facility's former inhabitants.
However, it's the sound design that truly elevates the horror atmosphere. The game uses audio cues masterfully to build tension—distant footsteps, rattling chains, and whispered voices create a sense of dread even when no enemies are visible. Playing with headphones transforms the experience entirely, making those sudden ghost appearances genuinely startling. I still remember nearly dropping my phone when a spectral prisoner appeared behind me while I was examining a newspaper clipping.
The puzzle mechanics in Endless Nightmare 4 strike a good balance between challenge and accessibility. You'll need to:
What makes the exploration rewarding is how the game gradually opens up new areas as you solve puzzles, creating a satisfying sense of progression. Finding a key card after a particularly challenging ghost encounter feels genuinely rewarding, especially when it grants access to a previously inaccessible wing of the prison.
The combat system provides multiple options for dealing with enemies. Available weapons include:
Each weapon has distinct advantages in different situations. I've found the shotgun particularly effective against stronger enemies at close range, while the pistol is better for conserving ammunition against standard ghosts. The weapon selection adds strategic depth to encounters, as you must decide whether to engage or avoid enemies based on your current loadout.
The upgrade system is one of the game's more compelling features. Weapons can be enhanced by collecting parts and alloys found throughout the prison, improving damage, reload speed, and magazine capacity. This progression system provides a satisfying power curve as you advance through the game.
Resource management is equally important. Medical syringes for healing, lockpicks for shortcuts, and ammunition are all limited, creating tension during exploration. One particularly tense moment from my playthrough involved being caught with only two shotgun shells remaining as three ghosts patrolled the cafeteria I needed to cross—forcing me to use stealth and distraction instead of direct confrontation.
After completing multiple playthroughs, I've developed several strategies that can significantly improve your chances of survival in this challenging horror adventure.
Efficient resource management is crucial for survival. Based on my experience, I recommend:
A particularly effective technique I've discovered is "room clearing"—systematically eliminating ghosts in an area before thorough exploration, allowing you to search without constant threat.
Mastering both stealth and combat improves your chances of survival:
One tactic that saved me repeatedly was the "peek and retreat" method—opening a door slightly to draw out a ghost, then hiding in a nearby cabinet to ambush it when it investigates.
Endless Nightmare 4: Prison features multiple endings based on decisions and actions throughout the game. Without spoiling the story, key factors influencing your ending include:
The most satisfying ending requires finding all story-related documents, which provide context for Scott's situation and the prison's history with the paranormal.
Completing achievements not only provides satisfaction but also rewards you with useful resources. Focus on these achievements early:
APKFlex.com users have reported that focusing on these achievements early provides resources that make the mid-game significantly easier by allowing earlier weapon upgrades.
Installing Endless Nightmare 4: Prison on mobile devices is straightforward:
For Android:
For iOS:
The game is free to download but contains ads and optional in-app purchases that can enhance the experience by reducing grinding for resources.
For a larger-screen experience with better controls, you can play on PC using an Android emulator. According to LDPlayer's website, these are the steps:
APKFlex.com recommends using keyboard mapping features in emulators to improve control precision, which is particularly helpful during tense combat encounters. The enhanced graphics capabilities of PCs also bring out the detailed environments more vividly than most mobile devices.
To ensure smooth performance:
On mid-range devices, lowering shadow quality and draw distance can significantly improve frame rates without substantially affecting the visual experience.
Based on user reviews and my experience, common issues include:
The developers regularly update the game to address technical issues, with the most recent update focusing on optimizing game content for better performance.
Endless Nightmare 4: Prison delivers a compelling horror adventure that stands out in the mobile gaming landscape. While not without flaws—particularly its ad implementation and occasionally frustrating movement speed—the game offers an impressive atmosphere, engaging gameplay loop, and genuinely frightening moments that horror fans will appreciate.
The combination of exploration, puzzle-solving, and combat creates a varied experience that keeps players engaged throughout multiple playthroughs. The multiple endings provide incentive to replay and explore different approaches to situations, adding substantial value to this free-to-play title.
Whether you're a longtime fan of the Endless Nightmare series or new to mobile horror games, this fourth installment offers a genuinely unsettling experience that will keep you on edge as you help Scott escape his prison nightmare and seek redemption.
Yes, Endless Nightmare 4: Prison is free to download and play on both Android and iOS. However, the game contains advertisements and optional in-app purchases. Many players note that ads appear frequently, particularly when obtaining resources like ammunition. You can watch these ads for rewards or make purchases to reduce their frequency.
The download size for Endless Nightmare 4: Prison is approximately 800MB after full installation. The initial APK download is smaller, but you'll need additional space for the complete game data. Make sure you have at least 1GB of free space on your device before installing to accommodate the game and any future updates.
Yes, Endless Nightmare 4: Prison can be played offline once downloaded. This makes it an excellent option for gaming while traveling or in areas with limited internet connectivity. However, you'll need an internet connection for the initial download, to view ads for rewards, and to access any online features or updates.
Yes, Endless Nightmare 4: Prison offers multiple difficulty modes that affect enemy strength, resource availability, and puzzle complexity. Each difficulty level can lead to different endings, encouraging multiple playthroughs. Beginners should start on the normal difficulty to get accustomed to the game mechanics before attempting higher difficulty settings.
You can contact 707 INTERACTIVE for support through their official channels. Their support email is supportme@blingcrush.zendesk.com. Additionally, they maintain an active presence on Facebook (EndlessNightmareGame) and Discord (discord.gg/ub5fpAA7kz) where they regularly interact with the community and address player concerns and technical issues.
Please share by clicking this button!
Visit our site and see all other available articles!