Hydraulic Empire

50KS
Released Jul 31, 2015by Batholith EntertainmentMixed(51% of 73 Steam reviews)

Hydraulic Empire is a Tower Defense game with RPG elements focusing on strategy, interactions between mobs, and persistent upgrades. Hydraulic empire is a must have for any true Tower Defense fan, and for those that are not it is a gateway into the tower defense genre.

Offers

What are keyshops?

Keyshops

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

GameBoost
GameBoostKeyshop
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Multipacks (1)

About Hydraulic Empire

"Hydraulic Empire looks to be that entry into the genre that I have been waiting for." -

What is it?

Hydraulic Empire is a Tower Defense game with RPG elements focusing on strategy, interactions between mobs, and persistent upgrades. What we are doing with Hydraulic Empire is taking the best of what we have experience over the years, and then we are adding elements that are unique.

How much Content is there?

We have over 20 levels (21 at launch and we will continue to add more as time goes on), 10 mobs, 10 towers, a builder that levels as you play, and tons of mob interactions. All in all at launch there is about 15 hours of gameplay.

Whats Different about our TD?

Tower Defenses are not new, and they are not evolving much anymore. We aim to change that by adding in a variety of unique mob interactions. We are also adding in tons of RPG elements and we have a hero/builder that will allow you to take part in more of the battle.

Mob interactions are our major innovation. Where as they are not 100% new to the tower defense genre, they are typically simple or not very interesting. We have taken this to the next level, and centered our game squarely around them. Mob interactions will take place all over a level, and will change where and how you choose to build in a level. The interactions vary greatly based on which mob die in which order. This aspect of the game has given the game almost endless replay ability. Most of our mobs will interact with at least 2 or 3 other mobs. Some interactions open up new interactions, and others will lock out some interactions.

A Taste of the Story

"Peace had been a dream, and the light of its hope has been overshadowed by a new enemy. My own people have turned on me. For what reason, I do not yet know. But there is no option but to fight, if for nothing else but the undying dream of peace at least. I am the First Lieutenant General of the Great Mech Army, but you may call me the Keeper, for I protect the dreams of many. And I call to you for aid. The mobs close in, thirsty for the land we won through fearsome attrition. And I am the only one who now stands in their way."

Game details

Hydraulic Empire price history

Lowest tracked price: €0.81 (Jul 9, 2026) · current best: €1.55.

Hydraulic Empire player count & reviews

51% positive reviews all-time · 0 peak players in the last 30 days.

Hydraulic Empire — frequently asked questions

Where can I buy Hydraulic Empire at the cheapest price?

Right now the cheapest offer for Hydraulic Empire is €1.55 at GameBoost. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price Hydraulic Empire has ever been?

The lowest price KingsPrice has tracked for Hydraulic Empire is €0.81 (recorded on Jul 9, 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 Hydraulic Empire?

Hydraulic Empire peaked at 0 concurrent players on Steam in the last 30 days (highest on Jul 7, 2026). The player chart on this page updates daily.

Is it safe to buy a Hydraulic Empire 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 Hydraulic Empire at a discount?

Create a free price alert on this page and KingsPrice will email you when Hydraulic Empire 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.

System requirements

Minimum

Minimum:
  • OS *: Windows XP
  • Processor: Atom Z3740D
  • Memory: 2 GB RAM
  • Graphics: Intel Integrated HD4000
  • DirectX: Version 10
  • Storage: 450 MB available space
  • Sound Card: Integrated Card

Recommended

Recommended:
  • OS *: Windows 8.1 or above
  • Processor: Intel i5 2600k
  • Memory: 4 GB RAM
  • Graphics: AMD 6850 or above
  • DirectX: Version 11
  • Storage: 450 MB available space
  • Sound Card: Integrated Card

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