Hydraulic Empire

Hydraulic Empire

Batholith Entertainment · July 31, 2015 · Casual, Tower Defense, Strategy, Action, Indie

Buy Hydraulic Empire from CJS CD Keys at $1.85 — the cheapest of 5 stores we compare.

PC
Mixed51% · 73
Best price 39 Fair price
$1.85-77%
lowest tracked $0.79
CJS CD Keys Buy at CJS CD Keys

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Where to buy Hydraulic Empire — official stores

Steam
Steam
Standard Edition · Steam
$7.99
Buy
Fanatical
Standard Edition · Steam
$7.99
Buy
Humble Store
Humble Store
Standard Edition · Steam
$9.99
Buy
IndieGala Store
IndieGala Store
Standard Edition · Steam
$9.99
Buy

Cheapest Hydraulic Empire keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

CJS CD Keys
CJS CD Keys
Standard Edition · Steam
$1.85
Buy

Hydraulic Empire price by region

Hydraulic Empire costs £0.48 in the United Kingdom, €0.55 in Europe (EUR), $1.85 in the United States, $1.85 in Georgia (USD), zł3.04 in Poland, CA$8.79 in Canada, NZ$9.99 in New Zealand, A$11.50 in Australia and R$15.99 in Brazil right now.

Cheapest Hydraulic Empire offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £0.48 −91% £5.59 £0.48 6
Europe (EUR) €0.55 −93% €7.99 €0.55 5
United Statesyour region $1.85 −77% $7.99 $1.85 5
Georgia (USD) $1.85 −74% $6.99 $1.85 4
Poland zł3.04 −90% zł28.99 zł3.04 4
Canada CA$8.79 CA$8.79 — 4
New Zealand NZ$9.99 NZ$9.99 — 3
Australia A$11.50 A$11.50 — 4
Brazil R$15.99 R$15.99 — 3

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Hydraulic Empire

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

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."

Hydraulic Empire — game info

Platforms
Windows
Player modes
Single-player
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Not recommended Feb 25, 2019
This could have been a cool tower defense game, but as others have already mentioned, the balancing is way off. Some maps are literally impossible to solve unless you select the exact tower placement (and thus force the enemies on the specific path) that is required. No matter if you have ultra-upgraded towers or not, you simply will not win unless you get the path correct. While some may find this challenging, I found it tedious in the extreme - playing a level over and over. Note also that this is based on the "medium" difficulty setting. There are two settings higher than this. I doubt I will explore them. The other issue with this game is the glitches. After playing 3 or 4 rounds, the sound begins to skip and distort. This gets worse the longer you play, until after about 45 minutes the sound is painful to listen to. At this point your only choice is to close the game and then reload it. The same thing happens with the video - especially if you have lots of enemies on the screen at once. The frame rate will suddenly pause, and then when it resumes everything runs really fast to "catch up". Frustrating doesn't begin to describe the experience. (Note that this is wi…
4 found this helpful
Recommended Oct 13, 2019
This is a decent tower defense game. It's a bit unpolished and the UI isn't great, but there is a good variety of towers and enemies, your character gains levels and can attack, and you can boost yourself or your towers through a city upgrade system. If you like TD games, I'd say it's worth checking out, especially if it's on sale.
2 found this helpful
Not recommended Apr 3, 2024
Not worth playing. Graphics are bad and UX is awful: painfully slow pan speed, tooltips that obscure upgrade buttons, unit selection that conflicts with tile selection, etc... It can't even exit correctly, I have to manually kill it after exit so the music stops.
1 found this helpful
Not recommended Jul 24, 2023
Bad graphics, poor options, punishingly difficult in the sense that many levels can only be solved a single way. There's plenty of better TD offerings out there.
1 found this helpful
Not recommended Jul 2, 2019
just another old tower defense.
1 found this helpful
Not recommended Feb 20, 2026
Hydraulic Empire is a decent tower defense game with some genuinely fresh ideas — the controllable builder hero, hex-grid maze building, and mob interactions keep things engaging in ways most TD games don't. That said, the game has real rough edges: sound and music glitch out after extended play sessions, high scores don't save reliably, and the upgrade system feels painfully incremental with tiny stat boosts that barely register. Some later levels devolve into pure trial-and-error since there's often only one correct path layout, which kills the strategic freedom the game advertises. At a sale price it's worth a look for TD fans, but go in knowing you're getting an ambitious but unpolished early effort.

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