Complete Guide to All Security 51 Achievements: Unlock Every Badge

Security 51 has quickly become a cult favorite among fans of inspection-style horror games, blending the tension of document-screening with the eerie atmosphere of Area 51. If you're hunting down every badge, understanding the full list of Security 51 achievements is essential for maximizing your playthrough. With 68 total achievements spanning from straightforward day-one milestones to incredibly rare endgame unlocks, tracking your Security 51 achievements helps you plan your strategy and prioritize goals throughout the campaign.

Based on community data from the Steam Community achievements page for Security 51, the reward distribution reveals a steep difficulty curve. Early-game badges are nearly universal, while late-game unlocks require deep mastery of increasingly complex mechanics.

Understanding the Achievement System in Security 51

The achievement structure mirrors the game's escalating difficulty curve. What begins as a simple document-checking job—comparing faces to photos, verifying names and numbers—gradually expands into a multi-layered management simulation involving X-ray scans, isolation ward experiments, and citywide epidemic monitoring.

Player experience reports indicate that the game introduces new mechanics almost every in-game day. Rules change constantly, and instructions that were critical yesterday may be irrelevant today. This design directly impacts which achievements you can pursue at any given time.

Achievement Rarity Tiers at a Glance

The table above shows that more than half of all Security 51 achievements fall into the ultra-rare category, meaning fewer than 5% of players have unlocked them. This makes 100% completion a significant long-term challenge.

Common Achievements: Your Day-One Unlocks

The easiest achievements are tied to basic gameplay actions you'll perform naturally during your first few shifts. These require no special strategy—just playing through the opening hours.

Community reports suggest that most players unlock the first three achievements within their opening session. The key to "Excellent Guard" is reading the daily instructions carefully—rules change every shift, and yesterday's deviations may not matter today.

For sandwich-related achievements, visit the store between shifts. You'll need coins earned from successful shifts, so maintaining accuracy early on funds your snack habit. The store also sells tools and X-ray upgrades that become essential later.

Mid-Tier Achievements: Stepping Up Your Game

As you progress deeper into the game, achievements become tied to more complex mechanics. The experience introduces X-ray scanning, photo documentation, medical certificate verification, and eventually isolation ward management.

The "Professional" achievement deserves special attention. Player experience indicates that maintaining a five-day streak requires meticulous attention to rule changes. Each morning, the game presents new instructions—sometimes contradictory to previous days. The trick is to treat every shift as a blank slate.

For "Weird Science," you'll need access to the isolation ward, which unlocks as part of the story progression. You can conduct one experiment per day, so plan ahead and don't skip days. The data from these experiments directly feeds into citywide operations later in the game.

Rare and Ultra-Rare Achievements: The Real Challenge

This is where Security 51 achievements become genuinely punishing. The game's late stages pile on simultaneous responsibilities—desk screening, elevator monitoring, isolation ward experiments, and citywide operations—all demanding your attention during time-limited shifts.

The steepest drop-off occurs around the 5% mark, where achievements require either massive cumulative effort or near-perfect playthroughs of the game's most chaotic segments.

Hidden Achievement Strategies

Several ultra-rare achievements appear to be story-critical or tied to specific choices during the citywide operations phase. Community reports mention:

• "I Told The Mushrooms I Wouldn't Eat Them!" (1.1%) requires resolving the Mushroom Satan crisis using Machina Fatorum
• "World Saved: 1" (0.1%) is likely the game's true ending achievement
• "Don't Blink!" (0.1%) references the Weeping Angel mechanic mentioned in-game

The game's upgrade store sells an item described as fast enough to capture a weeping angel in the blink of an eye, suggesting this achievement requires purchasing specific equipment and using it during a particular encounter.

Pro Tips for Efficient Achievement Hunting

If you're serious about unlocking all 68 Security 51 achievements, you'll need a structured approach. Here are the most important strategies:

Key Reminders

• Rules change daily: Even if someone has a third eye or a fish brain, if today's instructions don't mention it, let them through
• Time management matters: Shifts have timers, and remaining visitors at shift end result in fines
• Upgrade strategically: The X-ray area and camera upgrades become essential for mid-game achievements
• Embrace failure: Some achievements like "It's Just Not Your Day" require intentional failure
• The elevator is a source of frustration: Multiple player reports mention difficulty identifying infected individuals in the elevator segment

Achievement Roadmap: Recommended Unlock Order

For players aiming at 100% completion, following a logical progression through the Security 51 achievements prevents unnecessary backtracking:

1. Phase 1 (Days 1–5): Focus on common achievements—complete shifts, punch passes, buy sandwiches
2. Phase 2 (Days 5–10): Pursue "Professional" streak, begin tracking security calls
3. Phase 3 (Days 10–15): Unlock isolation ward, start daily experiments, advance floors
4. Phase 4 (Days 15+): Manage city operations, pursue rare photo and quarantine achievements
5. Phase 5 (Endgame): Target hidden achievements, complete remaining experiments, aim for "World Saved: 1"

This roadmap aligns with the game's natural difficulty curve, ensuring you tackle achievements when the relevant mechanics are active. Several Security 51 achievements are tied to specific story phases, so rushing past content without completing optional objectives may lock you out of certain badges.

Frequently Asked Questions

How many achievements does Security 51 have? Security 51 features 68 total achievements, ranging from common day-one unlocks (98.1% completion) to ultra-rare endgame badges (0.1% completion). The full list of Security 51 achievements is available on the Steam Community achievements page.

Are there missable achievements in Security 51? Based on community reports, several achievements tied to isolation ward experiments and citywide operations may be missable if you progress past certain story thresholds without completing them. It's recommended to conduct one experiment daily and never skip city operation checks.

What is the rarest Security 51 achievement? Multiple achievements share the 0.1% completion rate, including "World Saved: 1," "Don't Blink!," "Cyberjurassic Park," and "Say 'Cheese!'" These require deep progression into the endgame content and mastery of all simultaneous mechanics.

Do I need multiple playthroughs to unlock everything? While some achievements like "It's Just Not Your Day" (zero correct decisions) conflict with "Excellent Guard" (zero mistakes), they can be pursued on different days within a single playthrough. However, community reports suggest that certain story-branch achievements may require separate runs.