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Cataclismo
Design and build fortresses brick by brick to stand against endless hordes of Horrors in this real-time strategy game with resource management, siege defense, and exploration. Lead from the ramparts, push back the darkness, and hold fast against the creatures of the Mist.
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 2026-05-12.
What reviewers agree on
68 of the 104 reviews raise this.
“Devs please let me fix your game for you in two incredibly easy steps. 1. Make oxygen not require stairs 2. Make roofs braindead easy It really hurts to downvote this game but Im hoping it makes the devs see this…”
“Brilliant little RTS with a gorgeous art style and a surprisingly engaging campaign story. You don't get a lot of time between waves (the harder levels require you to move nearly as fast as a competitive RTS when it…”
24 of the 104 reviews raise this.
“I think this could have been something truly special but after 20hrs, I've walked away and here's why. The art style in the game, story, and general 'sim' part of the game is done exceedingly well. You can feel the…”
“A good, flawed game. A lot of strange design choices. Polished though, with a sleek art direction. If you've played They Are Billons or Age of Darkness adjacent games, and you liked it, then you might like this as well.…”
“Brilliant little RTS with a gorgeous art style and a surprisingly engaging campaign story. You don't get a lot of time between waves (the harder levels require you to move nearly as fast as a competitive RTS when it…”
24 of the 104 reviews raise this.
“Devs please let me fix your game for you in two incredibly easy steps. 1. Make oxygen not require stairs 2. Make roofs braindead easy It really hurts to downvote this game but Im hoping it makes the devs see this…”
“I think this could have been something truly special but after 20hrs, I've walked away and here's why. The art style in the game, story, and general 'sim' part of the game is done exceedingly well. You can feel the…”
“seems like more love was put into the story/ambience than the gameplay”
13 of the 104 reviews raise this.
“Brilliant little RTS with a gorgeous art style and a surprisingly engaging campaign story. You don't get a lot of time between waves (the harder levels require you to move nearly as fast as a competitive RTS when it…”
“I love this game, the replay value is high and it is so relaxing to play but also can be very challenging.”
“Would highly recommend the campaign. Great story. Extreme difficulty is great for those familiar with this genre and who are seeking a challenge”
9 of the 104 reviews raise this.
“I love this game, the replay value is high and it is so relaxing to play but also can be very challenging.”
“Very good game, the campaign is fun and there's great replay value. I love the ability to create your own defenses, especially since it has a real impact on gameplay. I'd really like to see a co-op mode or maybe even a…”
“I don't even know how I came across this game but it was exactly what I was looking for. It's almost that perfect blend of a tower defence game wrapped up in an RTS package. The base/defence building is some one of the…”
23 of the 104 reviews raise this · 13 of them still recommend the game.
“Devs please let me fix your game for you in two incredibly easy steps. 1. Make oxygen not require stairs 2. Make roofs braindead easy It really hurts to downvote this game but Im hoping it makes the devs see this…”
“I think this could have been something truly special but after 20hrs, I've walked away and here's why. The art style in the game, story, and general 'sim' part of the game is done exceedingly well. You can feel the…”
“A good, flawed game. A lot of strange design choices. Polished though, with a sleek art direction. If you've played They Are Billons or Age of Darkness adjacent games, and you liked it, then you might like this as well.…”
7 of the 104 reviews raise this · 6 of them still recommend the game.
“After losing to only level 4 in campaign over and over and over and over, I just dont seem to get this game to click with me. Its EXTREME micro managing at a semi pro level of starcraft. For someone casually playing…”
“Never played a base-building, tower defense game like this one, with such freedom of expression and creativity. I was expecting tougher, more intense missions, especially the Citadel and the Alta Perl. Those passed too…”
“Offers something genuinely fun and frustrating in equal measure - it feels like the pause is a crutch for poor balance though.”
5 of the 104 reviews raise this · 2 of them still recommend the game.
“After losing to only level 4 in campaign over and over and over and over, I just dont seem to get this game to click with me. Its EXTREME micro managing at a semi pro level of starcraft. For someone casually playing…”
“The style and the UI are pretty good, yet the game still lacks depth in its systems and level design. It sucks that there is so little to learn and gain in each level that I wish the levels didn't end at all. Also the…”
“Horrible- the game made me replay the same level over and over again. I quit before the 2 hour mark so I am not stuck with a faulty game. Its to bad because the game seemed fun”
3 of the 104 reviews raise this · 1 of them still recommend the game.
“Wanted to like this game but; The camera controls are absolutely horrible, not having full and free control over the rotational pan (instead you rotate the camera in like 30 degree increments) is insane. The voxel style…”
Counted across 104 English reviews, sampled to match this game's 88.8% positive rating · as of 2026-05-12
“[h1][b]The World in Mist[/b][/h1] [quote]The world has been plunged into a mist, and humanity is on the brink of extinction. You play as Lady Iris, mankind's last hope. You must leave the last city, Hogar, and embark on an expedition to find the mysterious pearl that can save…”
— a player, Steam review · 60 hrs played“This game is underrated and I hope it gets the love it deserves. Not perfect, but you can't get this gameplay from other games. The allure of this game is the ability to lay down massive but intricate defenses at the drag of a mouse. Of course your are weak at the start, but…”
— a player, Steam review · 66 hrs played“I really want to like this game but I find the creation and organising of economy and defensive structures to be fiddly, tedious and unsatisfying. The pleasure in these games comes from devising clever solutions, but there is too much friction in the process here for it to be…”
— a player, Steam review · 5 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-05.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. 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 (2026-09-04). 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.
Hotfix 1.3.17 — Key Binding Fixes, Thanks for Supporting The Old Kingdom & More!
Fellow Hogardians! First of all, thank you so much for the incredible support you've shown The Old Kingdom! It's been great seeing you venture into the mist once again to build up your citadels and fi
Save 50% on Cataclismo
Defend your fortress in Cataclismo, now 50% off during its Steam Daily Deal. Cataclismo's new DLC The Old Kingdom is also currently 10% off. Cataclismo is a medieval fantasy siege defense game where y
Cataclismo - The Old Kingdom DLC is Released!
Hello Hogardians! The Old Kingdom DLC for Cataclismo is now available, with a 10% launch discount! This is Cataclismo's first DLC, and we're so excited to share it with you. In The Old Kingdom, you'll
Cataclismo's The Old Kingdom DLC Arrives on August 20, 2026
Hello Hogardians! We're excited to announce that Cataclismo is getting its first DLC, The Old Kingdom! It's set to release on August 20, 2026. Check out the announcement trailer here: In The Old Kingd
Save 50% on Cataclismo
Defend your fortress in Cataclismo, now 50% during the Hooded Horse July Publisher Sale. Cataclismo is a medieval fantasy siege defense game where you build fortifications, rally defenders, and fend o
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-12.
| Genres | Simulation, Strategy |
| Player tags | Strategy · Base-Building · Simulation · RTS · City Builder · Building · Grand Strategy · Tactical · Sandbox · Management · Moddable · Historical (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Trading Cards · Steam Workshop · Camera Comfort · Color Alternatives · Custom Volume Controls · Adjustable Difficulty |
| Languages | English * , French, German, Spanish - Spain, Japanese, Portuguese - Brazil, Russian, Simplified Chinese, Traditional Chinese, Korean, Polish, Hungarian, Italian, Czech, Turkish, Ukrainian * |
| Achievements | 43 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows® 10 (64-bit) Processor: Intel® Core™ i7-4770 (quad-core) / AMD® FX-Series™ FX-9590 (quad-core) Memory: 8 GB RAM Graphics: NVIDIA® GeForce® GTX 760 (2 GB) / AMD® Radeon™ R9 270X (2 GB) DirectX: Version 11 Storage: 10 GB available space