Guardian's Keep
FPS + Tower Defense — Free 3D Browser Game, No Download Required
Game Information
About This Game
Guardian's Keep is a free-to-play FPS tower defense game that runs directly in your browser. As a guardian protecting a village and its 20 residents, you must fend off waves of robot invaders using a combination of personal combat and strategic defense building. Built with Three.js, the game features a stylish cartoon/cel-shaded 3D world with 20 unique stage themes — from grassland villages and dark forests to floating islands and crystal caverns.
Fight enemies head-on with three upgradeable weapons — a sword for devastating close-range combat, a bow for long-distance precision, and magic for powerful area-of-effect attacks. Between waves, build and upgrade defensive structures like cannons, turrets, crossbows, mines, and spike traps along enemy paths. With 20 stages, 3 difficulty levels per stage, and 5 waves per level, you'll face 300 total waves of increasingly challenging robot enemies including flying drones and massive boss mechs.
Explore the expanding hub world between missions, visit weapon shops, equipment stores, and upgrade facilities using gems earned from battle. The star rating system rewards skillful play — keep all 20 villagers alive for a perfect 3-star rating and maximum gem rewards. With three difficulty modes (Easy, Normal, Hard), Guardian's Keep offers a challenge for both casual and hardcore players alike.
Key Features
3 Upgradeable Weapons
Wield a sword (up to 40 damage), bow (up to 30 damage at long range), and magic (up to 55 damage AoE with slow effect). Each weapon upgrades through 3 levels.
5 Defensive Structures
Build cannons (80 damage explosions), rapid-fire turrets (5 shots/sec), long-range crossbows, mines (120 damage), and spike traps with slow effects. All upgradeable to level 3.
20 Stages × 3 Levels
Journey through 10 unique environments — grasslands, dark forests, deserts, volcanoes, frozen mountains, swamps, ruined castles, floating islands, crystal caves, and the demon realm.
4 Enemy Types + Bosses
Face Scout Droids (30 HP), Heavy Mechs (120 HP), Recon Drones (20 HP, flying), Assault Drones (80 HP, flying), and stage bosses with 500–2000 HP.
Hub World & Shops
Explore an expanding 3D hub world with weapon shops, equipment stores, and player upgrade facilities. Spend gems to permanently boost your stats and unlock new gear.
Star Rating & Progression
Protect 20 villagers to earn up to 3 stars per level. Stars determine gem rewards (50–200 gems). Level up your character to boost HP, attack, and speed.
Weapons
Master three distinct weapon types, each upgradeable to level 3 via the hub world's weapon shop:
Player Weapons
| Weapon | Type | Lv1 Damage | Lv3 Damage | Lv3 Speed | Range |
|---|---|---|---|---|---|
| Sword | Melee | 15 | 40 | 1.5/sec | Close |
| Bow | Ranged | 10 | 30 | 1.2/sec | Long |
| Magic | AoE | 20 | 55 | 2s CD | Medium |
Defense Structures
Place structures along enemy paths to create an impenetrable defense line. Build and upgrade in real-time, even during combat:
Attack Structures
| Structure | Lv1 Damage | Lv3 Damage | Speed | Anti-Air | Cost |
|---|---|---|---|---|---|
| Cannon | 30 | 80 | 0.5–0.7/sec | No | 100–200 |
| Turret | 8 | 18 | 3.0–5.0/sec | Yes | 80–160 |
| Crossbow | 20 | 50 | 1.0–1.5/sec | Yes | 60–120 |
Trap Structures
| Structure | Lv1 Effect | Lv3 Effect | Type | Cost |
|---|---|---|---|---|
| Mine | 50 damage (small area) | 120 damage (large area) | One-time explosion | 40–80 |
| Spike Trap | 5 DPS + 20% slow | 15 DPS + 50% slow | Persistent | 30–70 |
Enemy Types
Defend against waves of robot invaders, each requiring different strategies:
| Enemy | HP | Speed | Gold | Type | Notes |
|---|---|---|---|---|---|
| Scout Droid | 30 | 2.0 | 10 | Ground | Basic infantry unit |
| Heavy Mech | 120 | 1.2 | 30 | Ground | High HP, slow-moving tank |
| Recon Drone | 20 | 3.0 | 15 | Flying | Immune to ground traps |
| Assault Drone | 80 | 1.5 | 40 | Flying | Heavy armored flyer |
| Titan Mech (Boss) | 500–2000 | 1.0 | 200 | Ground | Appears at Level 3, Wave 5 |
Stage Themes
Battle through 10 unique environments across 20 stages:
| Stages | Theme | Environment |
|---|---|---|
| 1–2 | Grassland Village | Green meadows, trees |
| 3–4 | Dark Forest | Deep woods, fog |
| 5–6 | Desert Oasis | Sand dunes, cacti |
| 7–8 | Volcanic Zone | Lava, rocky terrain |
| 9–10 | Frozen Mountain | Snow, ice |
| 11–12 | Swampland | Wetlands, dead trees |
| 13–14 | Ruined Castle | Broken walls, rubble |
| 15–16 | Floating Islands | Sky islands |
| 17–18 | Crystal Cavern | Glowing crystals, stalactites |
| 19–20 | Demon Realm | Dark castle, purple sky |
How to Play
PC Controls
- W / A / S / D — Move
- Space — Jump
- Shift (hold) — Dash
- Left Click — Attack
- Mouse — Look around
- V — Toggle 1st/3rd person view
- 1 / 2 / 3 — Switch weapon (Sword / Bow / Magic)
- B — Build mode
- E — Interact
- ESC — Pause menu
Mobile / Tablet
- Virtual joystick — Move
- Swipe — Look around
- Attack button — Attack
- Weapon buttons — Switch weapons
- Build button — Enter build mode
- Landscape mode — Recommended
Recommended For
Guardian's Keep is perfect for fans of FPS tower defense hybrids like Sanctum, Orcs Must Die!, and Dungeon Defenders. If you enjoy the strategic depth of tower defense games combined with the action-packed thrill of first-person shooters, this game delivers both in a beautiful cartoon 3D world. With three difficulty modes and an expanding hub world, it offers hundreds of hours of gameplay for both casual and hardcore players.
