Security 51 Walkthrough – Day 1 to 14 (Level 1)

Welcome to part 1 of Into Indie Games’ walkthrough for Security 51.

This is your first day on the job as the security officer within Area 51. Your job is simple: scan people, verify their identities, and follow instructions to decide who to let through, who to deny, and when to call the guards for assistance. Days 1 to 14 take place on the first level as you gradually unlock new Tools and learn the ropes.

This article is part of our Security 51 Walkthrough Hub.

For more information about the game, check out its Steam page here.

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Day 1 (Tutorial)

Day 1 serves mostly as the tutorial. Most of the features are locked. When you start the game, your supervisor comes and explains the gist of what you have to do: screen visitors according to instructions you’ve been given.

After he leaves, the first visitor comes in. You’ll have to look at the two IDs and compare the name and number, and match the face with the photo to figure out if it’s authentic.

If all is good, drag the Access Card and punch the Approved (Green) section. If something is off, deny access by punching the Denied(Red) section.

After allowing four visitors to enter, the Elevator will fill up. Send it down by pressing the highlighted button. As the elevator comes back up, if there are passengers on board, you can use the Camera to monitor them. This will be useful later. For now, close the Camera window and open the elevator door when it reaches the top.

With that, Day 1 is complete. You’ll get an end-of-day report where you can see your total earnings.

Press the highlighted Store button to access the store and buy Consumables and Tools. Consumables allow you to refill your Satiety and Sanity. If they drop to zero, your run ends. Tools let you upgrade all the tools you’ll use to scan the visitors.

For now, buy a Sandwich and move on to the next day.

Day 2 (Shift Length, X-Ray Scanner)

Day 2 begins with the Supervisor coming in once again. He’ll reveal that Day 1 was a simulation, and Day 2 is when the real job begins. He’ll also tell you to read the Instructions carefully and follow them to the T.

Day 2 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • External body anomalies.

Click Start Shift to get started. As soon as you do so, the game will show you the 24-hour clock and how the shift length works.

TL;DR, try to complete all your tasks and end your shift quickly to earn a bonus. Remember, making wrong choices will also lead to penalties.

As the first visitor arrives, you’ll be shown how to use the X-Ray Scanner to detect Body Anomalies. The first visitor on Day 2 always gets denied entry.

Continue inspecting the following visitors carefully using the X-Ray Scanner and operate the Elevator when needed. The rest of the day is pretty uneventful.

• Earnings: $159
• Mistakes: 0
• Bought Items: 2x Sandwich

Day 3

You don’t meet anyone as Day 3 starts. So click on Start Shift to get started. However, before you do so, read the Instructions carefully since the game is paused.

Day 3 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
• Call Security, ignoring previous instructions, if the following are detected:
  • Fake name on passport or pass
  • External neck anomalies

The first visitor of the day comes in with a case of mismatched names on the ID. As per the instructions, your task is to Call Security.

Press the highlighted button on the bottom right to take him away.

It’s pretty much business as usual the rest of the day. Remember, Body Anomalies are fine according to the Instructions as long as it’s not on the neck. Also, make sure you Call Security when you’re meant to. Denying access when you’re supposed to Call Security will also penalize you. End your shift when you’re done screening all the visitors.

• Earnings: $159
• Mistakes: 0
• Bought Items: Sandwich, X-Ray (Area)

Day 4 (Polaroid)

On Day 4, you’ll unlock the Polaroid feature and can take photographs of the visitors. Start the shift when you’re ready and take a close look at the instructions.

Day 4 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
• Call Security, ignoring previous instructions, if the following are detected:
  • Anomalies in the photo

When the first visitor comes, click on the Polaroid and aim it at the face of the person. It’ll start showing static blur.

Wait a few seconds for the photo to develop. You’ll see that the visitor has hollow eyes, an Anomaly. According to the instructions, you’re supposed to Call Security.

For the rest of the day, make sure you check each visitor with the Polaroid. If there’s static, that means an anomaly is present, and you need to call Security. Otherwise, if their ID and face check out, let them through.

• Earnings: $193
• Mistakes: 0
• Bought Items: 2x Sandwich, Polaroid (Development Time)

Day 5 (Medical Certificate)

Day 5 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • External body anomalies
• Call Security, ignoring previous instructions, if the following are detected:
  • Forged medical certificate

Once the first visitor arrives, you’ll detect an anomaly using the X-Ray Scanner. Click on the anomaly and then click on the button on your screen. Then select Ask to ask for a medical certificate.

The certificate is clearly forged. So Call Security on them as per the instructions.

The rest of the day, make sure you also check for anomalies using the X-Ray Scanner. Deny entry even if they have an authentic certificate. If the certificate is forged, Call Security.

• Earnings: $181
• Mistakes: 0
• Bought Items: Polaroid (Development Time)

Day 6 (Isolation Ward)

The supervisor visits you again on Day 6, upgrading your Clearance Level. From this day, you’ll also be able to check for anomalies in people inside the Elevator as they’re leaving the facility.

You’ll have to Isolate or Exterminate them as needed. If you choose to Isolate them, they’ll be sent to the Isolation Ward where you can use them for research. You’ll learn more about them as you go. For now, start the shift when you’re ready.

Day 6 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
• Call Security, ignoring previous instructions, if the following are detected:
  • External body anomalies
• Let through, ignoring ALL instructions if the following are detected:
  • Anomalies in the photo

Once you send the first visitor through, send them down using the Elevator button. Click on the Camera button to inspect the inside of the Elevator as it’s coming back up.

Switch to Night Vision to spot Fungus on one of the visitors. Click on them and select Isolate. Switch to Thermal Imaging, and you’ll find Fungus on the second visitor as well. Isolate them too.

Click the highlighted button on your computer to enter the Isolation Ward. You’ll find the Isolated characters sitting inside the chamber.

Click on the highlighted button to conduct different research. For now, you can only choose the DUCC Project Display.

Continue along with your main job. Remember, if there’s a Photo Anomaly, you’ll have to let the visitor enter even if they have other issues. I also found a weird Superhero visitor who flew off during this shift.

In addition, whenever the lift is coming up, make sure you check the Camera and inspect all the visitors for anomalies. I found two more visitors with anomalies and sent them to the Isolation Ward before the day ended.

• Earnings: $202
• Mistakes: 0
• Bought Items: 2x Sandwich

Day 7 (Citywide Monitoring Interface, Organ MRI Scanner)

The supervisor upgrades your security clearance once again on Day 7 and gives you access to the Citywide Monitoring Interface. Note the report at your desk. When you’re ready, start your shift

Day 7 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
• Call Security, ignoring previous instructions, if the following are detected:
  • Internal organ anomalies

The first thing you have to do today is click the City button on your computer to access the Monitoring Interface. This adds another layer to your gameplay, where you have to complete Field Operations before the Unknown Disease reaches the danger mark. Field Operations will consume your Sanity.

Conducting successful research at the Isolation Ward unlocks more Operations. But you can only perform one Operation per day.

With the Field Operation out of the way, return to your regular task. You’ll get access to the Organ MRI Scanner to detect anomalies in the Internal Organs. If anything is out of the ordinary, Call Security according to the Instructions.

The day is pretty uneventful other than this. The Isolation Ward is inaccessible this day, so if you find anomalies in the Elevator, Exterminate them.

• Earnings: $231
• Mistakes: 0
• Bought Items: 1x Sandwich, MRI of Organs (Area)

Day 8

Day 8 doesn’t start with anything special other than a report that the Isolation Ward is now fully functional.

Day 8 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • Internal organ anomalies
• Let through, ignoring ALL instructions if the following are detected:
  • Anomalies in the photo

Remember to conduct a new Field Operation (Monitoring Interface) and Research (Isolation Ward). Don’t worry, the game will be paused when you’re away from your desk. From this point onward, I’ll list out my choices:

• Field Operations: Collect Samples
• Research: Arithmometric Test

Continue with your task as usual. Remember, you’ll need to send people to the Isolation Ward. So check the Elevator Camera whenever someone is coming up. This will be a long shift. Take your time and try to get as many accurate checks as possible. I messed up once and lost $10 as a penalty for missing the Wrong ID Number.

• Earnings: $192
• Mistakes: 1
• Bought Items: 2x Sandwich, 1x Sedative

Day 9 (Thermal Scanner)

Day 9 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
• Call Security, ignoring previous instructions, if the following are detected:
  • Hypothermic Areas
• Let through, ignoring ALL instructions if the following are detected:
  • Hyperthermic Areas
• Field Operations: Collect Samples
• Research: Prolonged Inhalation of Lilac 8

On Day 9, you gain access to the Thermal Scanner, which gives you infrared vision to check the visitor’s temperature. You’ll have to look for Hyperthermic and Hypothermic Areas. Hyperthermic Areas are Pink while Hypothermic Areas are Black. I also sent two more visitors to the Isolation Ward.

• Earnings: $199
• Mistakes: 0
• Bought Items: 2x Sandwich, 1x Sedative

Day 10 (Phantom Hound)

Our Research at the Isolation Ward unlocked the new Field Operations: Outreach.

Day 10 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • External body anomalies
• Call Security, ignoring previous instructions, if the following are detected:
  • Heart Anomalies
• Let through, ignoring ALL instructions if the following are detected:
  • Phantom hound in the photo
• Field Operations: Outreach
• Research: None

The day begins with a quick tutorial showing you the Handbook. Click the highlighted button to access it.

The Handbook will contain a picture of the anomaly Phantom Hound that you’ll have to look for today. As you progress further, new anomalies will get added to the Handbook that you can inspect. The game is paused when accessing the Handbook.

With that done, continue your task for the day. Make sure you photograph each person to see if the anomaly is present. If there’s static, move the camera around and take a photograph of the area with the most static. Wait for the film to develop and see if the anomaly is present before making your decision.

• Earnings: $278
• Mistakes: 0
• Bought Items: 2x Sandwich, 1x Sedative, Thermal Imager (Area)

Day 11 (Bone MRI Scanner)

You’ll get a quick report that the Isolation Ward is functional again. Start your shift when ready.

Day 11 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • Bone anomalies
• Call Security, ignoring previous instructions, if the following are detected:
  • Forged medical certificate
• Field Operations: Collect Samples
• Research: Dihydrogen Monoxide Treatment

This day is pretty straightforward. You’ll get a new scanner that lets you inspect the skeleton of the visitors. Use it to identify any anomalies and ask for a medical certificate. If the certificate is forged, Call Security. If not, deny them access.

• Earnings: $255
• Mistakes: 0
• Bought Items: 2x Sandwich, 1x Sedative

Day 12

I unlocked three Operations on Day 12: Control Outbreaks, Prevent Mass Gatherings & Study Los Huevos Influence.

Day 12 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • Internal organ anomalies
• Call Security, ignoring previous instructions, if the following are detected:
  • Rib anomalies
• Field Operations: Study Los Huevos Influence
• Research: Quartz-12 Exposure

Your main Tool for Day 12 is the Organ and Bone MRI Scanner. Use it to scan the internal organs and skeleton of the visitors and look for anomalies. If the anomaly is in the Rib, you have to Call Security. Remember, anomalies in other parts of the bone structure are still fine.

• Earnings: $191
• Mistakes: 0
• Bought Items: 2x Sandwich, 1x Sedative

Day 13

Successful Research on the previous day unlocked new Operations: Study Tardifuma Influence.

Day 13 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
• Call Security, ignoring previous instructions, if the following are detected:
  • Internal organ anomalies
• Let through, ignoring ALL instructions if the following are detected:
  • Brain anomalies
• Field Operations: Prevent Mass Gatherings
• Research: High Temperature Exposure

Stick to using the Organ MRI Scanner for the day. It’s a long shift with a lot of visitors to screen. But overall, it’s pretty easy since you won’t have to juggle a bunch of tools.

• Earnings: $288
• Mistakes: 0
• Bought Items: 2x Sandwich, 1x Sedative, MRI of Bones (Area).

Day 14

On Day 14, I unlocked the Local Los Huevos Propagation Operations.

Day 14 Instructions are as follows:

• Always let through, except when the following are detected:
  • Mismatched details between passport and pass (name, number, or photo)
  • Internal organ anomalies
• Call Security, ignoring previous instructions, if the following are detected:
  • Bone anomalies
• Let through, ignoring ALL instructions if the following are detected:
  • Hyperthermic Areas
• Field Operations: Local Los Huevos Propagation
• Research: Retro-Acoustic Test

This is the final shift of this level. And considering how you have to use three different Tools while screening, it can be easy to mess up. I messed up once and got a penalty. But otherwise, it went pretty well.

• Earnings: $255
• Mistakes: 1
• Bought Items: 1x Street-Style Noodles, 2x B-Movie Action Flick.

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This concludes part 1 of our walkthrough for Security 51. For more interesting articles related to indie games, click the links below:

• Into Indie Games Homepage
• Capy Castaway Walkthrough
• Corsair Cove – Walkthrough Hub
• Beast Of Reincarnation – Walkthrough Hub
• Shards of Order – Walkthrough & Guides Hub