Theseus Protocol Steam Key — compare prices from $9.99

Loading…

Theseus Protocol Steam Key — compare prices from $9.99 | KingsPrice

Offers

What are keyshops?

Official stores

Official stores with direct support.

Steam

SteamSteamOfficial

updated Jul 19, 2026

Lowest price

$9.99

Shop now ↗

Green Man GamingTheseus ProtocolOfficial

updated Jul 19, 2026

$9.99

Shop now ↗

Keyshops

Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →

EnebaTheseus Protocol (PC) Steam Key GLOBALKeyshop

updated Jul 19, 2026

$18.34

Shop now ↗

About Theseus Protocol

Theseus Protocol is a deck building strategy roguelike set in a dire dystopian world. Take the role of Prometheus and alter the fate of humanity with a collection of vigorous cards and a variety of weapons at the ready. Journey across disparate lands, encounter relentless foes, and unveil Mark City’s darkest secrets.

Unravel the fragmented narrative of Mark City across a divergent city riddled with elitist conspiracies and gang induced turmoil. Explore branching paths through successive playthroughs and reveal the history behind Mark City and its inhabitants. Each step plays a role in uncovering the truth.

Engage in stimulating turn-based battles and unleash an arsenal of extraordinary cards against brutal adversaries. Gain the tactical advantage by changing positions to dodge incoming attacks and even cause enemies to crash into one another. Leave no waste, as any cards leftover can be utilized as ammunition for Prometheus’ weaponry. The fate of humanity lies within the ultimate deck and a masterful strategy.

Key Features:

Dynamic and stimulating turn-based battles with a strategic twist
Nonlinear, fractured narrative to unravel across a roguelike adventure
Progressive deck building through successive runs
Influential card-fueled weaponry
Three playable characters all with unique combat styles and narrative threads

Game details

Released

Developer

Publisher

Platforms

Steam Deck

Playable

Steam rating

Mixed (70%)

Age ratings

IGRS 3DEJUS LSTEAM_GERMANY 0

Game modes

Theseus Protocol price history

Lowest tracked price: $9.99 (Jul 7, 2026) · current best: $9.99 across 3 stores.

Theseus Protocol player count & reviews

70% positive reviews all-time · 1 peak players in the last 30 days.

Theseus Protocol — frequently asked questions

Where can I buy Theseus Protocol at the cheapest price?

Right now the cheapest offer for Theseus Protocol is $9.99 at Steam. KingsPrice compares 3 offers from 3 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price Theseus Protocol has ever been?

The lowest price KingsPrice has tracked for Theseus Protocol is $9.99 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.

How many people play Theseus Protocol?

Theseus Protocol peaked at 1 concurrent players on Steam in the last 30 days (highest on Jul 8, 2026). The player chart on this page updates daily.

Is it safe to buy a Theseus Protocol Steam key from a keyshop?

Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →

How can I get Theseus Protocol at a discount?

Create a free price alert on this page and KingsPrice will email you when Theseus Protocol drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.