Home / Games / Theseus Protocol
Theseus Protocol
Theseus Protocol is a deck building roguelike where rebirth offers strategic opportunity. Utilize a powerful suite of cards and weaponry to uncover the cruel truth behind the dystopian sci-fi world of Mark City.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-02 · quoted reviews as of 2026-05-13.
What reviewers agree on
29 of the 53 reviews raise this.
“Written By Hidden Gems Review : https://store.steampowered.com/curator/38624426/, Follow me! Theseus Protocol it's a roguelite deckbuilder game which I want like it because of his great and amazing anime artstyle and…”
“This game has decent graphics. But the game is still pretty simple. The fun: The game has potential. there are some fun combos. A nice array of things to combo (weapons, equipment, cards) The kinda fun: There are…”
“Reviewing card games is what we do! I played version of Theseus Protocol just before it was released into EA. I was going to say that it's an ok roguelike deckbuilder but lacked anything that would differentiate it from…”
15 of the 53 reviews raise this.
“Written By Hidden Gems Review : https://store.steampowered.com/curator/38624426/, Follow me! Theseus Protocol it's a roguelite deckbuilder game which I want like it because of his great and amazing anime artstyle and…”
“This game has decent graphics. But the game is still pretty simple. The fun: The game has potential. there are some fun combos. A nice array of things to combo (weapons, equipment, cards) The kinda fun: There are…”
“TL;DR Aside from few UI and translation bits that aren't polished, Theseus Protocol is a decent roguelike deck building game. After completing a run with the 1st character, you'll get past the unfriendly UI and find a…”
6 of the 53 reviews raise this.
“Written By Hidden Gems Review : https://store.steampowered.com/curator/38624426/, Follow me! Theseus Protocol it's a roguelite deckbuilder game which I want like it because of his great and amazing anime artstyle and…”
“It's true that there isn't a whole lot to the game yet, though I'll say that for $10, it's very fun, well-made, and so far both Charlotte and Antiope are very different and very fun to play in their own ways. I love…”
“If you like games like Slay the Spire and Monster Train, you will probably enjoy Theseus Protocol. It's different, but it's by no means going to start a revolution in the genre, nor is it going to be genre defining like…”
6 of the 53 reviews raise this.
“Reviewing card games is what we do! I played version of Theseus Protocol just before it was released into EA. I was going to say that it's an ok roguelike deckbuilder but lacked anything that would differentiate it from…”
“A Diamond In The Rough First and foremost, I need to disclose that I got a free review copy of this game, but this review is not paid and is my unbiased opinion. If you want a TL;DR: The game is off to a good start for…”
“First of all, I made an earlier negative review complaining about my save file being delete,d but the devs replied very quickly with a solution to my problem. I'm very grateful for their help, so I deleted that review.…”
5 of the 53 reviews raise this.
“May 2023: The game has significantly approved and featured some overhauls. Many cards and equipment have been remade, the entire tree of weapon upgrades as overhauled as well. Runs are longer, giving you more time to…”
“The game is overall fun but it's pretty short. Once you get used to the game play, it's like at most 2 hours to complete in it's current state. Pro - It's Fun to deck build - Nice designs for characters and enemies -…”
“This one is a little bit different than your average deck building games. The mechanics are what makes this game stands out than the rest. The player has 2 weapons that can be charged by exhausting cards, which…”
16 of the 53 reviews raise this · 3 of them still recommend the game.
“Written By Hidden Gems Review : https://store.steampowered.com/curator/38624426/, Follow me! Theseus Protocol it's a roguelite deckbuilder game which I want like it because of his great and amazing anime artstyle and…”
“Reviewing card games is what we do! I played version of Theseus Protocol just before it was released into EA. I was going to say that it's an ok roguelike deckbuilder but lacked anything that would differentiate it from…”
“Terrible tutorial Too complicated since the start for no good reason give you a choice to choose a card before you even start playing And those cards have a status I don't even know what it is Why do you think having 8…”
14 of the 53 reviews raise this · 7 of them still recommend the game.
“Terrible tutorial Too complicated since the start for no good reason give you a choice to choose a card before you even start playing And those cards have a status I don't even know what it is Why do you think having 8…”
“It's... not bad. I almost want to give it a thumbs up, but this game starts to crumble under its own weight. It tries to do too much at one time and it becomes a mess. I've played a LOT of card games, so I figured I'd…”
“I want to preface my review by saying that I don't hate it...but I also found nothing to like. You still get the satisfaction of clearing the game, that's true, but that's true for any roguelike. In actuality, the…”
10 of the 53 reviews raise this · 7 of them still recommend the game.
“TL;DR Aside from few UI and translation bits that aren't polished, Theseus Protocol is a decent roguelike deck building game. After completing a run with the 1st character, you'll get past the unfriendly UI and find a…”
“The english translation is really bad. It makes the narrative events completely un-enjoyable for me personally.”
“It's true that there isn't a whole lot to the game yet, though I'll say that for $10, it's very fun, well-made, and so far both Charlotte and Antiope are very different and very fun to play in their own ways. I love…”
9 of the 53 reviews raise this · 6 of them still recommend the game.
“This game has decent graphics. But the game is still pretty simple. The fun: The game has potential. there are some fun combos. A nice array of things to combo (weapons, equipment, cards) The kinda fun: There are…”
“It's true that there isn't a whole lot to the game yet, though I'll say that for $10, it's very fun, well-made, and so far both Charlotte and Antiope are very different and very fun to play in their own ways. I love…”
“If you like games like Slay the Spire and Monster Train, you will probably enjoy Theseus Protocol. It's different, but it's by no means going to start a revolution in the genre, nor is it going to be genre defining like…”
7 of the 53 reviews raise this · 3 of them still recommend the game.
“This game has decent graphics. But the game is still pretty simple. The fun: The game has potential. there are some fun combos. A nice array of things to combo (weapons, equipment, cards) The kinda fun: There are…”
“TL;DR Aside from few UI and translation bits that aren't polished, Theseus Protocol is a decent roguelike deck building game. After completing a run with the 1st character, you'll get past the unfriendly UI and find a…”
“First of all, I made an earlier negative review complaining about my save file being delete,d but the devs replied very quickly with a solution to my problem. I'm very grateful for their help, so I deleted that review.…”
Counted across 53 English reviews, sampled to match this game's 69.6% positive rating · as of 2026-05-13
“This game has a lot of depth for what looks like fairly simple card mechanics at the start, and keeps building on it as you go through new runs. My only gripe is leveling up a character and getting upgrades takes quite a while, but thankfully whenever you do get an upgrade for a…”
— a player, Steam review · 14 hrs played“Slay the spire-esque with added mechanics. Seems promising but definitely needs some spellchecking/grammar review in English.”
— a player, Steam review · 2 hrs played“Right now, I feel like there's way too little and what is there is incredibly unbalanced. There is no way to adjust the difficulty, Nena (the summoner class) doesn't even summon that often due to a lack of cards that can summon, not like that matters anyway because shield spam…”
— a player, Steam review · 4 hrs playedAchievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-19.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-08-12. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-25). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
【1.0.10823】2023.8.23 Minor Bug Fixed Announcement
Minor Bug fixed. If you encounter any other problems, please leave a message or join our Discord to provide feedback.
【1.0 Release】Theseus Protocol is now in version 1.0.
After a period of polishing and optimization, Theseus Accord officially launched its official version on August 22nd. We would like to thank all the players who have been with us since EA. The 1.0 ver
[Test version 0.9.0707] New game mode, achievement system available.
NOTE: This update will clear players' battle archives (game settings, user archives remain). We expect to update after 8:00 AM PST on the 6th, players should prepare in advance (we recommend playing t
[Beta Version 0.9.0628] 6.28 Update announcement
Join our discord and share your opinion and feedback! The overall update content is as follows: 1. Added a switch function between playing cards modes and charging modes to facilitate pure touch scree
2023.6.21【Minor Bug Fixed Announcement】
We have discovered a bug that affects the game progress and saving files after the game update. It has been fixed immediately. We deeply apologize for the inconvenience caused to you! · Fixed the bug
Games like Theseus Protocol
From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.
Griftlands
93.2% · 5,621 reviews
shares Roguelike Deckbuilder, Card Battler, Deckbuilding, Card Game
Chrono Ark
93.7% · 2,862 reviews
shares Roguelike Deckbuilder, Card Battler, Deckbuilding, Card Game
Trials of Fire
88.3% · 1,730 reviews
shares Roguelike Deckbuilder, Card Battler, Deckbuilding, Tactical RPG
Nowhere Prophet
71.2% · 793 reviews
shares Card Battler, Deckbuilding, Tactical RPG, Strategy RPG
Beneath Oresa
78.5% · 939 reviews
shares Roguelike Deckbuilder, Deckbuilding, Cyberpunk, Card Game
StarVaders
98.0% · 2,404 reviews
shares Roguelike Deckbuilder, Card Battler, Deckbuilding, Card Game
Shogun Showdown
96.7% · 3,751 reviews
shares Roguelike Deckbuilder, Deckbuilding, Tactical RPG, Strategy RPG
Touhou: Lost Branch of Legend
97.7% · 659 reviews
shares Roguelike Deckbuilder, Card Battler, Deckbuilding, Strategy RPG
Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Player tags | Roguelike Deckbuilder · Card Game · Card Battler · Deckbuilding · Rogue-like · Turn-Based Combat · Tactical RPG · Anime · Strategy RPG · Story Rich · Female Protagonist · 2D (SteamSpy community voting) |
| Features | Single-player · Steam Cloud · Family Sharing |
| Languages | English, Simplified Chinese * , Traditional Chinese * , Japanese * * |
| Achievements | 26 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows 10(64bit) Processor: Dual Core 2 GHz(64bit) Memory: 4 GB RAM Graphics: Intel HD 4600(AMD or NVIDIA equivalent) DirectX: Version 11 Storage: 4 GB available space