Killzone.io

CO-OP CORE DEFENSE
Build defenses. Survive 10 waves. Don't let the core die.

Mouse: aim / place · Wheel: rotate build · LMB: slow-mo · SPACE: warp · M: mute · F: fullscreen · H: help

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LOBBY

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Share the code with friends. Anyone ready can start the round.

CHOOSE CLASS

DIFFICULTY (host only)

Round goal: defend the core through 10 waves. Clear wave 10 to unlock ∞ Endless Mode. Credits drop each wave — spend during PREP.

HOW TO PLAY ▼

— COMBAT — WASDMove your ship MouseAim · hold LMB for slow-mo bubble SpaceWarp dash — teleport forward (3 charges) RMB / FLaunch homing missiles — TEAM — VPing cursor location for teammates EnterOpen team chat MToggle music mute FToggle fullscreen — BUILD — 1-9, 0, -Select building during PREP phase ClickPlace building at cursor (PREP) R-ClickUpgrade / repair / sell a building U / R / XQuick upgrade / repair / sell ESCCancel build selection

Tips: Stay near the core during combat. Buy relics in the shop during PREP. Turrets fire automatically. Boss waves (5, 10) are extra tough — save credits! Press H anytime for full controls.

▶ PREP PHASE — BUILD NOW

You can only place turrets & walls during PREP. When combat starts, no more building — survive the wave!

1-9pick a building (cannon, laser, wall, spike…) Clickplace it where your cursor is Bopen the full build menu ▶ START WAVEskip the prep timer when you're ready

💡 Tip: walls + turrets behind them = classic tower defense. Funnel enemies and shoot them down.

SETTINGS

Music Volume80%

SFX Volume70%

Screen Shake ON

Damage Numbers ON

Show FPS / Ping ON

Teammate HUD ON

Auto-Ready OFF

CRT Filter (optional, default off) OFF

Particle Quality

Minimap Size

Press ESC or click ⚙ to close

CONTROLS

Mouse Move + aim

LMB Hold for slow-mo (slows nearby teammates too — co-op!)

SPACE Warp dash (3 charges)

RMB Launch homing missiles (or press F)

1-6 Choose upgrade when level-up panel shows

Enter Open team chat

TAB Scoreboard / Spectate (when dead)

V Ping cursor location for teammates

G Quick-comm wheel (Help/Attack/Defend)

T Quick chat wheel (1-8 to send tactical callouts)

H Toggle this help

Arrows Alternative movement (like WASD)

BUILDING (PREP PHASE)

1-9, 0, - Select building type

Click Place selected building

U Upgrade nearest building

R Repair nearest building

X Sell nearest building

ESC Cancel placement

SPECTATOR (WHEN DEAD)

TAB Next teammate

Shift+TAB Previous teammate

PICKUPS

⚔ Damage — 2x damage for 8s

◇ Shield — invulnerable for 6s

⌛ Time Warp — instant slow-mo 3s

Press H or click anywhere to close

CORE BREACHED

The music stopped.

SCORE

WAVE

KILLS

COMBO

TEAM

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TIME

DAMAGE

Your teammate is waiting…

Press ENTER to continue