Compare Prison Architect: Undead prices across trusted key stores and find the best deal. Developed by Double Eleven, Introversion Software. Published by Paradox Interactive. Released on 10/11/2022. Available on PC. Genres: Indie, Simulation, Strategy.

A survival-focused Prison Architect expansion where you're defending inmates from zombie hordes instead of managing cell blocks.

Prison Architect: Undead flips the management sim formula by introducing waves of undead attacks as your primary challenge. Instead of balancing budgets and inmate needs, you're fortifying perimeters, allocating guards to defense, and keeping your population alive through escalating siege scenarios. The core loop still rewards planning and resource allocation, but the tower-defense elements feel bolted onto mechanics designed for a different game. You'll need to think about chokepoints and guard positioning rather than rehabilitation programs. With 43% positive reviews, player feedback suggests the zombie theme doesn't gel cleanly with Prison Architect's deliberate pacing. The expansion works if you want a shorter, high-stakes scenario break from the base game, but it lacks the depth that makes the original compelling. The level editor is included, so custom survival maps are possible if the base scenarios wear thin. Diego, Scout Team

Prison Architect: Undead

Prison Architect: Undead

Oct 11, 2022Double Eleven, Introversion SoftwareParadox Interactive
GamerScout Says

A survival-focused Prison Architect expansion where you're defending inmates from zombie hordes instead of managing cell blocks.

PC
Best Price Available
€1.49-50%
at Steam
Lowest tracked: €1.37
Track this price

GamerScout Verdict

A thematic detour that weakens Prison Architect's strengths; entertaining for a few hours, not a replacement for the core game.

Compare Prices(4 stores)

SteamBest price
StandardEurope (EU)Steam KeyKey
€1.49-50%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€1.96-34%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€2.63-12%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€2.81-6%
Priced in EUR by the store
Buy

Every store in this table quotes us in euros, so the EUR figure is the price the seller actually set, not our arithmetic — which is why EUR is also the currency we rank in. We only list an offer here when the store gives us its price in euros, so nothing in this table is a number we invented.

Pick USD, PLN, GBP, CAD or AUD in the header and we convert from EUR at the European Central Bank reference rate — converted amounts are prefixed with ~. Your bank or the store may apply a different rate at checkout. We never hide offers based on where you are: everyone sees this whole table.

We may earn a commission when you buy games through links on this page — at no extra cost to you. It never affects our rankings or verdicts.

Price History

Lowest tracked
€1.3714 Aug 2026
Current best
€1.49
Official storesKeyshops
€1.30€1.54€1.79€2.0314 Aug20 Aug26 Aug1 Sept7 Sept
Tracking prices since 14 Aug 2026
Create alert

Screenshots & Media

About Prison Architect: Undead

Prison Architect: Undead flips the management sim formula by introducing waves of undead attacks as your primary challenge. Instead of balancing budgets and inmate needs, you're fortifying perimeters, allocating guards to defense, and keeping your population alive through escalating siege scenarios. The core loop still rewards planning and resource allocation, but the tower-defense elements feel bolted onto mechanics designed for a different game. You'll need to think about chokepoints and guard positioning rather than rehabilitation programs. With 43% positive reviews, player feedback suggests the zombie theme doesn't gel cleanly with Prison Architect's deliberate pacing. The expansion works if you want a shorter, high-stakes scenario break from the base game, but it lacks the depth that makes the original compelling. The level editor is included, so custom survival maps are possible if the base scenarios wear thin.

Diego
Diego · Scout Team

Strategy & simulation

Tags

auto-admittedTower DefenseSurvival MechanicsDLC ExpansionResource ManagementSingle Map FocusScenario-Based

System Requirements

Minimum

Processor
Intel Core2 Duo 2.4Ghz or Higher / AMD 3Ghz or Higher
Memory
6 GB RAM
Graphics
Nvidia 8600 / Radeon equivalent (2009 era) Hard Drive:400 MB HD space

Keep exploring

Community Discussion

Be the first to comment on Prison Architect: Undead.

Reviews & Ratings

Steam
43%(100)

Game Info

Developer
Double Eleven, Introversion Software
Publisher
Paradox Interactive
Release Date
Oct 11, 2022

Features

Single-playerDownloadable ContentSteam AchievementsSteam Trading CardsSteam WorkshopSteam CloudIncludes level editorFamily Sharing

Price Alert

Get notified when the price drops below your target!

Create Alert
Best price€1.49
See offer

Across the 24,365 games we track, a verified key was cheaper than the official store 90% of the time. See the method and the full numbers in our game price report.

No card? Pay another way

Top up your Steam Wallet or buy crypto with any card — instant delivery, no bank account needed.

More from Double Eleven, Introversion Software

Buy smarter: helpful guides

Looking for more? See games like Prison Architect: Undead →

Frequently asked questions about Prison Architect: Undead

How much does Prison Architect: Undead cost?

As of 7 September 2026, the cheapest in-stock offer for Prison Architect: Undead is €1.49 at Steam, out of 4 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy Prison Architect: Undead cheapest?

The lowest in-stock price we track for Prison Architect: Undead is €1.49 at Steam (7 September 2026). We compare 4 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is Prison Architect: Undead available on?

Prison Architect: Undead is available on PC.

When was Prison Architect: Undead released?

Prison Architect: Undead was released on 11 October 2022.

Who developed Prison Architect: Undead?

Prison Architect: Undead was developed by Double Eleven, Introversion Software and published by Paradox Interactive.