Crystal Defense
A crystal glows in the middle of a forest glade, and goblin warbands want to shatter it. Enemies approach along two trails, one from each side, that meet at the crystal. You have four fantasy towers, two special abilities and twenty waves to hold.
Crystal Defense adds active abilities to the classic formula. Meteor lets you strike any spot on the map, and Frost Nova slows every enemy at once. Both recharge slowly, so timing them for the boss waves is part of the strategy.
Play Crystal Defense
Loading Crystal Defense…
Your best score, sound setting and favorites are stored only in this browser (localStorage). A game in progress is not saved when you leave the page. On phones, landscape mode or the Fullscreen button gives the map more room.
How to Play
- Pick a tower (1–4) and tap a highlighted tile near either trail.
- Start waves with N. Enemies come from both the left and the right.
- Use Meteor (Q, then tap the map) for 160 area damage, and Frost Nova (W) to slow everything by 60% for 4 seconds.
- Tap a tower to upgrade it, sell it, or change its targeting mode.
- Keep the crystal's health above zero through 20 waves and two bosses.
Controls
Every action works with touch, mouse or keyboard. Hover is never required.
| Input | Action |
|---|---|
| Tap / click a tower button, then a tile | Build a tower (highlighted tiles are buildable) |
| Tap / click a built tower | Open its panel: upgrade, sell, targeting |
| Q / W or the ability buttons | Meteor (then tap a target) / Frost Nova |
| 1 – 6 | Select a tower type |
| Arrow keys + Enter | Move the map cursor and build or select on that tile |
| N | Start the next wave |
| Space or P | Pause / resume |
| F | Cycle speed: 1×, 2×, 3× |
| U / Delete | Upgrade / sell the selected tower |
| T | Change the selected tower's targeting mode |
| M | Sound on / off |
| Esc | Cancel building or close the tower panel |
Towers
- Archer Tower50 gold. Quick arrows for steady single-target damage.
- Magic Tower100 gold. Arcane bolts arc between nearby enemies (each jump deals 75%).
- Ice Tower70 gold. Slows groups of enemies.
- Cannon Tower80 gold. Splash damage for goblin crowds.
Every tower sells for 70% of everything spent on it. Upgrade costs are shown on the upgrade button.
Enemies
- GoblinBasic enemy.
- OrcTougher, slower, lightly armored.
- Dire WolfFast.
- Stone TrollArmor 6.
- Goblin ShamanHeals nearby enemies.
- Hollow Titan (boss)Wave 10. Speeds up as it weakens.
- Crystal Devourer (boss)Wave 20. Hardens a shield at 66%, calls wolves at 33%, and regenerates.
Strategy Tips
- The two trails meet only at the crystal, so split your early towers roughly evenly, then build the heaviest defense near the centre where both streams pass.
- Magic Towers are excellent against goblin crowds because the chain jumps between enemies walking close together.
- Stone Trolls have armor 6. Cannon shells and upgraded Magic Towers deal with them better than Archers.
- Save Meteor for Shamans walking in a group. Removing the healer stops the whole group regenerating.
- Keep Frost Nova for the boss waves: 4 seconds of 60% slow (30% on bosses, which resist half) buys a lot of tower time.
About Crystal Defense
Crystal Defense combines a two-trail map with player abilities that recharge over time. The central base means both trails end in the same place, which rewards towers near the middle that can reach both approaches.
It is a step up from Kingdom Defender: more enemy types, a healer, two bosses with phases and a longer 20-wave campaign. All art is drawn procedurally with vector shapes on the canvas.
