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Papers, Please-likes are a genre I genuinely love, usually for the interesting stories, the cool branching choices, and the general uneasy vibe they carry. Security 51 is the latest one I’ve played through, and it puts you in the boots of a security guard at Area 51, tasked with saving the world from a rotating cast of invasions and infestations using increasingly bizarre technology that inevitably becomes the next crisis you have to clean up.
The core loop will feel familiar if you’ve played anything in this genre: start your shift, check the people coming in and out of your underground bunker, and decide whether to let them through, reject them, exterminate them, or, if you’re feeling thorough, incarcerate them for a little light experimentation on the side. Alongside that, you’ve got a second track of “quests” out in the world, where you work toward developing the tech needed to counter whatever’s currently trying to end humanity. The story itself unfolds across three phases: first, you don’t know what the threat is; second, you’re fighting the very thing you just developed to stop the first threat; and third, you actually save the world, which kicks off a time loop letting you go back and play through all the paths you missed.
In terms of actual gameplay, this might be one of my favorite entries in the genre, in the sense that it keeps things simple while still giving you new requirements every day, capped at around four tasks. One day you’re scanning for organ anomalies with the X-Ray, checking blood type, then verifying name and number, and that’s it, that’s the whole day. The next, it’s just a personality test and an ID check. And this changes constantly, with conditions like “always let them through if X is true” or “always exterminate if Y is true” rotating in and out.
Where some of the newer entries in the genre try to trip you up with tiny details and mess with you right when you least expect it, Security 51 keeps things manageable, three or four tasks a day, but with a genuinely large variety of things to actually check. If you’re someone who plays these games for the difficulty, which, I’ll be honest, get a normal job I guess, this isn’t going to be the hardest challenge you’ll find out there. Speaking of which, you can finish a full playthrough in about 4 hours across 29 days to reach your first ending. I only had to restart twice, once right near the start, after fumbling a newly introduced mechanic I hadn’t fully understood yet.
So the gameplay is a genuine plus for me: complexity through variety, capped at a finite, manageable number of steps, rather than piling on endlessly. Great stuff. But here’s where the game’s main problem shows up. Most games in this genre balance the checkpoint loop with a “home” segment, interactions with family, friends, neighbors, spies, and so on. Security 51 doesn’t have any of that. There’s exactly one character, the person who hires you, and they only exist as a tutorial device. There’s no meaningful interaction with the people you check, no moral weight to letting someone through or turning them away, and no real narrative consequence tied to how you actually perform at the checkpoint.
The only thing that moves the story forward is what you do on those outside-world missions, and whether you clear certain thresholds on the tech you’re developing. Beyond that? Nothing, really. And the different apocalypse variants that can hit you are mostly a visual reskin rather than a meaningfully different playthrough, the game stays largely the same no matter which path you take. The only reason I’d replay it is if the gameplay alone carried me, and that’s not something I can say for most Papers, Please-likes, since there’s nothing inherently “fun” about checking documents if there aren’t story beats attached to it.
The pacing doesn’t help either. I expected a slow burn, normal days gradually giving way to anomalies as the game progresses. Instead, things go fully strange starting day 2, and stay at roughly that same intensity for most of the run.
One clear upside is the beautiful pixel art. I have no complaints there, it’s exactly what you’d want from a game like this. Most of the people you check look appropriately like cosmic horrors, the horror elements are genuinely creepy, the checkpoint room is nice to sit in for hours, and the animation work is smooth throughout. The day-intro cutscenes are clearly where the devs had the most fun, showing your security guard messing around with stuff like a Jenga tower, coffee flying off a mug, falling out of a chair. Simple, but genuinely pretty, and skippable entirely if you’re not someone who wants to sit through them.
There’s also a news mechanic, a little newspaper on your desk that updates each day, which sounds like exactly the kind of thing this setting should nail. Instead, it’s just randomized filler, headlines that don’t actually reflect anything happening in the world or reacting to your choices. Given the premise, you’d expect the news to at least hint at the state of the invasion or riff on decisions you’ve made, but it never does, it’s just noise on the table.
There are also a few mechanics that feel like they were meant to have a bigger impact than they end up having. There’s a hunger and sanity meter, but the only real consequence of neglecting either is dying outright once it hits zero, and both are trivially easy to keep topped off by buying the cheapest burger in the store between shifts, at almost no cost. Upgrades have a similar problem. Most are wildly expensive for what they offer. Want to extend your X-Ray range by a few pixels? That’ll be three days’ salary. I finished the game without maxing out a single tool, and honestly it wouldn’t even have been worth it, since you never know which tool you’re actually going to need on a given day.
Security 51
Bottom Line
Security 51 nails the checkpoint gameplay and backs it up with genuinely gorgeous pixel art. But it forgets the other half of what makes this genre work: there's no one to actually care about, no moral weight to your decisions, and almost nothing tying your daily grind to the story. Worth playing for the loop and the visuals, just don't go in expecting a narrative to match.
