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Watch trailer on Steam ↗Crystal Tower Defense
Hot Roof Studios · Published by Hot Roof Studios
Mixed — 69% positive (35 reviews) · 8 achievements
Last updated 27 Sept 2026
Stop an endless hoard of crystal-type enemies, with different attributes, from reaching the portal to earth! You can build your own labyrinths, unlock new turrets, upgrade them, unlock abilities, and also gather permanent bonuses.
£10.99
Lowest price we've ever recorded
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Price history
Strategy, Casual · 2023 · More £5 - £15 games
Craft your defenses and outsmart endless waves of crystal foes in Crystal Tower Defense. Strategically place traps and towers to protect the portal, unlocking new abilities as you progress through levels.
About this game
In Crystal Tower Defense you stop an endless amount of crystal-type enemies from reaching the portal to Earth. To achieve this goal you can build your own labyrinth using turrets and walls as well as selling obstacles on the map. You will need to stay alert since the enemies grow stronger the longer you defend the portal. Upgrade your turrets and alter the labyrinths layout to adapt to the new challenges.
Enemies will follow the path YOU create! This challenges you to experiment with different labyrinth layouts. The map, with its randomly generated obstacles, will tickle your strategic thinking every time you jump into a run. Remove map obstacles to open up new possibilities during a run and restructure your labyrinth to use each of your turrets to its full potential.
As you progress through the stages, you can unlock 10 turrets.
You can upgrade each turret's main stats in a run. The required gold is earned through destroying the enemies.
Range
Damage
Reload Time
Use 6 different abilities to support the turrets in your labyrinth and fend off the enmies.
Each enemy has a chance to drop crystals! These crystals are your primary currency and are used to unlock new and different turrets, as well as permanently upgrade them. Completing a stage rewards you with a big crystal that holds permanent upgrades for your turrets! You can equip these upgrades in the armory.
These big crystals can only be obtained playing the game. After each stage you get rewarded one big crystal. To claim them, you need to end your run manually, if you run out of lifes, you lose all your gathered rewards.
The higher the cleared stage is, the better are the rewards. The drop chance of each rarity, per stage, can be found in the menu.
The forge gives you the possibility of merging your hard-earned upgrades, to achieve bigger and better bonuses. Combine a multitude of possible items and find the best possible upgrade path!
Combining your upgrades always results in a better bonus. Combine multiple of the same, to decided the result type.
Range
Damage
Reload Time
Cost Reduction
Armor Damage
Shield Damage
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel 6th gen, AMD Zen 1st gen
- Memory: 2 GB RAM
- Graphics: GTX 670
- DirectX: Version 11
- Storage: 1 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 11
- Processor: Intel 9th gen, AMD Zen 3rd gen
- Memory: 2 GB RAM
- Graphics: GTX 1060
- DirectX: Version 11
- Storage: 1 GB available space
Supported Languages
*languages with full audio support
Latest news
AnnouncementsOfficial
Map Editor, Steam Workshop & Daily Challenges
This is our biggest update yet. Build your own maps, share them with the community, and put your defenses to the test in a fresh challenge every single day. New Map Editor Design your own tower defense maps from scratch. Design the grid, place obstacles, gates, and shape the enemy path however you likeComplete stage editor with waves, formations, timing as well as per wave enemy sequencesLet them get auto generated or hand craft every spawn yourself Difficulty tuningper enemy type stat multipliersspawn limitsenemy variantsper-stage scalingSet starting money, lives, turret limits, upgrade costs, and pre-placed turretsSteam Workshop Integration Share your maps and play maps made by others. Compete in per map leaderboardsPublish your maps to the WorkshopBrowse, subscribe and launch workshop maps directly in the game Maps must be beaten by their creator before they can be publishedPer map leaderboardsNew Daily Challenges A new challenge every day with global leaderboards. 30 unique challenge archetypes (Boss Rush, Swarm, Shield Breaker, Armor Piercer, and more)Four difficulty tiers: Easy, Medium, Hard, and HellEvery challenge has its own modifiers, per-stage scaling, available turrets and abilities Compete on global leaderboards and climb the ranksEarn loot boxes for completing runsOnly currency earned during the run can be spent and personal turret upgrades are not taken into account, so the leaderboard stays even for everyoneLeaderboardsRedesigned leaderboards/statistics screen Added a leaderboard panel to the game end screen, to show your new rank and how much you climbedPolish & Quality of Life Smooth fade transitions between scenes to reduce freezing when loadingFaster statistics and leaderboard screensPer-turret kill counter and live DPS readout in the side panelRestart button added to the pause menuSome UI readability and styling fixesPlease provide us with your feedback and share your map creations on our Discord.We can't wait to see the maps you build!Read full article on Community Announcements (hot-roof-studios)AnnouncementsOfficial
Map Editor [Beta]
Custom Map Editor \We are currently working on a custom map editor and want to make our current progress available to the community in a beta branch called map-editor. You can find out how to switch to the branch here Branches (Betas) (Steamworks Documentation).Switching branches will still use your current save, so please back it up from here \\AppData\\LocalLow\\HotRoofStudios\\CrystalTowerDefensePlease keep in mind, as this is a beta, there can be bugs and mistakes.Create your own maps and share them with the community through the Steam Workshop.Grid & Map DesignBuild your map from scratchAdjustable grid sizePlace entry and exit gates anywhere on the gridAdd obstacles to shape enemy pathingPre-place turrets on the gridChoose from our visual themesWave & Stage DesignDesign your challenge with two stage modes that can be freely combined.Manual StagesFull control over every wave. Choose enemy types, formations, spawn timing, stat multipliers, and wave delays.Auto-Generated StagesConfigure difficulty parameters and let the system build balanced waves for you. Set base difficulty, enemy type weights, formation preferences, and per-stage scaling.Endless ModeEnable endless mode to keep generating stages with escalating difficulty after your designed stages run out.Rules & RestrictionsEnable or disable specific turrets and abilitiesModify turret stats: adjust damage, range, reload time, cost, and moreLimit how many of each turret can be placedLimit how often abilities can be used per stageAdjust enemy stats globally: health, speed, armor, shields, rewardsConfigure per-stage stat scaling for increasing difficultySet starting gold, lives, and per-stage bonusesEnable/Disable obstacle sellingSteam WorkshopPublish your maps and play maps made by others.Browse, search, and subscribe to maps by other creatorsPer-map leaderboards, compete for high scores on every published mapHow Publishing WorksYou must beat your own map before it can be published. For endless mode maps, you ne...Read full article on Community Announcements (hot-roof-studios)Patch NotesOfficial
Accessibility Uptade
AccesibilityAdded a toggle for high contrast cursor in the settingsAdded a slider to change cursor size in the settingsRead full article on Community Announcements (hot-roof-studios)Patch NotesOfficial
Bug Fixes & Chinese Translation
TranslationAdded Chinese translation. If you have any suggestions for improvement, please send them to us via Discord. / 添加了中文翻译。如果您有任何改进建议，请通过 Discord 发送给我们。Bug FixesFixed forge upgrade animation getting stuckFixed items disappearing inside the forgeFixed inventory being stuck in dismantle modeRead full article on Community Announcements (hot-roof-studios)Patch NotesOfficial
Quality of Life Improvement
Quality of Life Added copy and paste functionality to targeting system Added grey out when the player has not enough money for a turret upgrade Added controls UI in the settings for hotkeys Bug Fixes Fixed wording for new unlocks Fixed selectable enemy types for targeting to appear on the correct wave (UI Bug)Read full article on Community Announcements (hot-roof-studios)
