Security 51 Achievements Guide: All 68, Confirmed 2026

This Security 51 achievements guide confirms all 68 unlocks straight from Steam's own Community stats page, and it's upfront about the fact that 42 of them, well over half, stay completely hidden. That's not a gap in this guide's research: Security 51 is built around anomaly discovery and escalating horror reveals, and Alawar hiding the majority of achievement descriptions fits a game that doesn't want its own surprises spoiled by a stats page. Our Security 51 tips guide already covers the checkpoint Manual, the isolation ward, and the sanity meter; this guide picks up specifically where achievements are concerned.

TL;DR: Security 51 has 68 total achievements, and only 26 show a public description; the remaining 42 are hidden. The rarest confirmed rate belongs to Major Arcana at 0.2% of players. Three separate isolation-ward milestones exist (10, 50, and 100 people quarantined), and a photography achievement, Say "Cheese!", tracks photographing 100 anomalies. Many of the hidden achievement names read as pop-culture references, a real, visible pattern in the list, though this guide doesn't guess at their exact triggers.

How many achievements does Security 51 have? (quick answer)

68. Steam's public Community stats page for Security 51 lists all 68 by name and unlock percentage. Only 26 include a visible description; the other 42 show nothing until earned. That's an unusually high hidden ratio, even for a horror game, and it lines up with a checkpoint sim built entirely around not knowing what's standing in front of you next.

Key takeaways

• 68 total achievements, all base game, confirmed directly from Steam's Community stats page.
• Only 26 have a public description. The other 42 are hidden, and this guide doesn't invent triggers for any of them.
• The rarest confirmed rate is Major Arcana at 0.2% of players.
• Three isolation-ward quarantine milestones exist: 10 people (58.2%), 50 people (15.9%), and 100 people (3.8%).
• Excellent Guard (96.4%, one mistake-free day) and Professional (44.4%, five in a row) show most players clear a clean shift once but rarely repeat it.
• Many hidden achievement names appear to reference other pop-culture horror and sci-fi properties, a visible pattern worth flagging honestly without treating it as confirmed mechanics.
• Not sure Security 51 is for you yet? Start with the full review.

The 26 confirmed achievements

These are the only unlock conditions Steam shows publicly, grouped by what they actually track.

The isolation ward forms its own clean progression: Quarantine (10 people, 58.2%) into We Have a Disco Ball (50 people, 15.9%) into Maître D' (100 people, 3.8%). That's a steep drop-off, roughly a 4x rarity jump at each step, which tracks with this site's tips guide flagging quarantine as a real decision with consequences rather than a free pass. I Told The Mushrooms I Wouldn't Eat Them! is the single most specific confirmed achievement on the list, naming both a "Mushroom Satan crisis" and a resolution method ("Machina Fatorum") directly in its own description, genuinely unusual specificity for an otherwise sparse set of unlock texts.

Steam achievement text doubling as a primary source is the same method this site used for Gamble With Your Friends and The Mermaid Mask, both of which also carry an unusually high hidden-achievement ratio for their genre.

Say "Cheese!" (1.6% of players) tracks photographing 100 anomalies using this exact Polaroid tool, one of the rarest confirmed achievements on the entire list.

GODEEPER: For the checkpoint Manual's actual rules and how to use the Rorschach test, UV light, and fingerprint scanner correctly, this site's tips guide covers the full toolkit. Security 51 Tips Guide: Surviving Your First Shift →

The 42 hidden achievements, sorted by rarity

Steam gives no description for any of these, so this section reports only the name and unlock rate. No guessed triggers.

A pattern worth naming honestly, without overstating it: a large share of these names read as direct nods to other franchises. Kuato Lives! echoes Total Recall, Petrificus Totalus! and No magic outside of Hogwarts! are both Harry Potter spells, Is That Megazord?! points at Power Rangers, Cyberjurassic Park combines two separate franchises in one name, and Who You Gonna Call? is the Ghostbusters line. That's a genuinely visible naming pattern across roughly a third of the hidden list, and it fits a checkpoint game about screening anomalies: each reference-named achievement most likely ties to encountering a specific creature type styled after that property. What isn't confirmed is the actual trigger for any single one of them, so this guide stops at naming the pattern rather than assigning a creature to each title.

Lab analysis tools like this one likely factor into several of the isolation ward's hidden achievements, including Weird Science's "conduct all experiments" requirement.

Major Arcana, at 0.2%, is the single rarest confirmed rate in the entire list, roughly a fifth of the next-rarest entries. Given tarot naming conventions and its position at the absolute bottom of the rarity table, it's reasonable to guess this is tied to a specific, hard-to-reach ending or a full-completion state, but that's exactly the kind of inference this guide won't dress up as fact. Treat it as the genuine long-tail chase achievement it clearly is by its rarity alone.

Step-by-Step: a sensible completion order

1. Play your first several shifts normally: You're a Guard, Harry!, Excellent Guard, Click-Clack!, and the basic pass-punching achievements all fire from ordinary play without any detour.

2. Buy shop items deliberately at least once each: Full Belly, Happy Heart (3 sandwiches), A Little Treat! (a pastry), and eventually Bring me antidepressants, Santa! (50 antidepressant purchases) are all cheap, low-risk unlocks worth working toward early rather than ignoring the shop entirely.

3. Build toward Professional once Excellent Guard is done: five mistake-free days in a row is a real jump in difficulty from one, so treat it as a dedicated goal, not something that happens by accident.

4. Commit to the isolation ward as a real system: work toward Quarantine, then We Have a Disco Ball, then Maître D' as a deliberate long-term arc, since 100 quarantined visitors won't happen through casual play alone.

5. Use the Polaroid camera on anomalies specifically, not visitors generally: Say "Cheese!" needs 100 anomaly photos, a much narrower target than photographing everyone who comes through.

6. Treat the hidden, reference-named achievements as a completionist's endgame: with over 40 of them and no confirmed triggers, expect these to require replaying shifts and exploring the isolation ward's full toolset rather than a single clean run.

Frequently Asked Questions

How many achievements does Security 51 have? 68 total, confirmed directly from the game's public Steam Community stats page. Only 26 show a visible unlock description; the other 42, well over half the list, stay hidden until earned.

Why are so many Security 51 achievements hidden? Most of the hidden entries have names that read as pop-culture references (Kuato Lives, Petrificus Totalus, Is That Megazord?!), which fits a horror-anomaly game where each unlock likely ties to encountering a specific, spoiler-sensitive creature type. That's a pattern visible in the names, not a confirmed mechanic.

What is the rarest achievement in Security 51? Major Arcana, at 0.2% of players, the single rarest confirmed rate on the list. It's hidden, so Steam doesn't say what triggers it, and this guide isn't going to guess.

Can you get achievements without making mistakes in Security 51? Yes, and two achievements specifically reward it: Excellent Guard (96.4%, not a single mistake in one day) and the much harder Professional (44.4%, five clean days in a row). The drop from 96 to 44 percent shows most players clear one clean shift easily but rarely string several together.

How many people do you need to quarantine for Security 51 achievements? Three separate milestones: Quarantine at 10 people (58.2%), We Have a Disco Ball at 50 (15.9%), and Maître D' at 100 (3.8%). The isolation ward is a real, tracked achievement path on its own, not just a side mechanic.

Does Security 51 have a photography achievement? Yes. Say "Cheese!" (1.6% of players) tracks photographing 100 anomalies, one of the rarest confirmed achievements on the list, using the desk's Polaroid camera tool.

Related Reading

• Security 51 Tips Guide: Surviving Your First Shift: the checkpoint Manual, blood test risk, and sanity system this guide's achievements build on.
• Security 51 Review: Papers Please Meets Area 51 Horror: this site's full verdict on whether the checkpoint loop holds up.
• The Mermaid Mask Achievements Guide: another achievement list with an unusually high hidden ratio, handled with the same no-guessing discipline.
• Mortal Shell II Achievements Guide: a very different genre, same Steam-first verification approach.
• Gamble With Your Friends Achievements Guide: a full rarity-band breakdown for a completely different kind of game.

References

• Security 51 on Steam: official store page, price, and review data.
• Security 51 Steam Community Achievements: the primary source for every achievement name, description, and unlock rate in this guide.