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Watch trailer on Steam ↗Hydra TD
Hydra · Published by Hydra
3 user reviews — 100% positive (3 reviews) · 25 achievements
Last updated 28 Sept 2026
Hydra TD is a stylized tower defense game built around smart placement and careful decisions. Place towers along the path, upgrade them over time, and hold back incoming waves before they reach the end. Complete the campaign, then continue into Endless mode to see how long your defense can hold.
£2.70
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Price history
Action, Indie, Strategy, Casual · 2026 · More under £5 games
In Hydra TD, place towers wisely to defend against waves of enemies. Upgrade them for better protection and tackle both the campaign and endless modes.
About this game
Hydra TD is a stylized tower defense game focused on smart placement and careful decisions.
Place towers along the path, upgrade them over time, and hold back incoming waves before they reach the end. Each tower fills a different role, and map layouts shape how you build your defense.
Enemy waves escalate over time, with periodic boss waves. Complete the campaign, then continue into Endless mode to see how long your defense can hold.
Three difficulty modes adjust enemy strength and economy, letting you push your strategy further.
Features
• 6 distinct towers
• 15 unique maps
• 3 difficulty choices
• Endless mode
• 25 Achievements
Controls
U - Upgrade
X - Sell
Tab - Fast Forward
Space - Start Wave
D - Toggle DPS Meter
Esc - Pause / Menu
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel Core i3 (or equivalent)
- Memory: 512 MB RAM
- Graphics: Integrated graphics (Intel HD 4000 or equivalent, OpenGL 2.1 support)
- Storage: 50 MB available space
- Sound Card: Any onboard sound
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Patch 1.2.0 - Tower Evolution
New Features Towers now gain upgrade branches, offering 2 augmentations to choose from at each upgrade tier Added a full keybinding menu to Settings UI & Flow Improvements Difficulty selection has been moved directly to the map selection screen for a smoother run setup flow Gameplay Increased overall enemy density for more intense waves Added additional map theming and biome variety across the campaignRead full article on Community Announcements (Hydra)Patch NotesOfficial
Update 1.1.0 - Introducing the Plasma Tower
New Tower: PlasmaFires a slow-moving blast that damages enemies as they pass through itPlays very differently from the rest, placement matters more than everGameplay ChangesManual wave start (no more forced prep timer)Added perfect wave bonusEnemies now react more to damage (improved hit feedback)Visual & UI ImprovementsImproved camera framing and zoom for a tighter gameplay viewMap selection now uses real in-game map previewsAdded a scrolling message panel for gameplay eventsAchievementsAdded 9 new achievements:No leak (Normal / Hard)250 Plasma killsNew 1000 kill milestones for every towerRead full article on Community Announcements (Hydra)AnnouncementsOfficial
A new tower is on the way
I’ve been working on the next Hydra TD update, and it’s starting to come together.The biggest addition is the 6th tower… Plasma.It fires a slow-moving blast down the lane, damaging enemies as they pass through it. It plays very differently from the other towers, so you’ll need to experiment with placement.Alongside that, I’ve been upgrading the feel of the entire game:improved hit feedback (enemies react more to damage)updated firing effects across towersvisual polish to tower shapes and attacksThere are also some gameplay improvements:manual wave start (no more forced prep timer)more focused camera framing during playa few new achievementsMore to come!Read full article on Community Announcements (Hydra)Patch NotesOfficial
Update 1.0.9 - Visual & Feedback Improvements
Improved projectile hit feedback on enemiesAdded new shock effectEnhanced world lightingSmoothed enemy movementRead full article on Community Announcements (Hydra)Patch NotesOfficial
Update 1.0.8 - Save Hotfix
Fixed an error on the victory screen caused by the save system. Apologies to any players affected!Read full article on Community Announcements (Hydra)
