Monster Siege
- Free to play
- Browser game
- Play with friends
Co-op monster shooting — team up with up to 6 players, defend the crystal core through 5 monster waves.
How to play
- Choose a mode: quick-match with other defenders, or create a private room and share the invite link with friends.
- Each defender mans a turret on the ring around the crystal core. Monsters march in from every edge — click or tap to shoot them down before they reach it.
- Landed shots charge your NOVA — when the bar is full, press Space (or the button) to blast every monster around your turret.
- It is co-op: one shared core, one goal. Focus fire the tanks, pop the demon's shield phases, and shoot the golden imp to heal the core.
- Consecutive hits build a streak multiplier — a missed shot resets it. Survive all 5 waves to win together.
Monsters & bounties
| Monster | HP | Core damage | Kill bounty | Field notes |
|---|---|---|---|---|
| Slime | 2 | -4 | +5 | Slow and squishy — easy warm-up targets. |
| Cave Bat | 1 | -3 | +8 | Fast and erratic — lead your shots. |
| Wraith | 3 | -8 | +14 | Drifts in wide arcs and hits the core hard. |
| Stone Golem | 8 | -15 | +30 | A walking wall of rock — focus fire together. |
| Demon Boss | 30 | -30 | +80 | The final-wave boss. Bring the whole squad. |
Streak bonus: 4 hits in a row = x1.5, 7 = x2, 12 = x3. One miss and it resets — accuracy beats spam. Monster HP scales with squad size, so every extra defender matters.
Bonus: a golden imp sometimes darts across the arena. It never attacks — but shooting it down pays 40 points and heals the core by 10 HP.
Two ways to play
Play with strangers
One click and you are matched into a live squad with other defenders from around the world.
Invite friends
Create a private room, copy the invite link, and share it — only people with the link can join your defense.
Features
- True co-op: up to 6 players man turrets around one shared crystal core
- See every teammate fight — tracers, kills and NOVA blasts in each player's color
- Charge your NOVA with accurate shots and wipe whole packs in one blast
- 5 escalating waves — from slime swarms to a shielded demon boss
- 5 monster types plus the golden imp bonus — each with its own speed, HP and tricks
- Streak multipliers and kill bounties reward sharp shooting
- Server-checked shots — no cheating, every hit is verified
- Built-in text chat and voice chat to coordinate the defense
- Free to play in the browser — desktop and mobile
FAQ
Do I need to install anything?
No — Monster Siege runs entirely in your browser on desktop and mobile. Just hit Play.
How do I play with my friends?
Choose "Invite friends" on the play screen — you get a private room and a link to share. Friends who open the link land straight in your squad.
Is it competitive or cooperative?
Both: the squad wins or loses together, but every defender earns an individual score from hits, kill blows and streaks — the post-match ranking shows who carried the fight.
What happens if nobody joins my match?
Quick-match squads fill up with other available defenders after a short wait, so a siege always starts.
What if my connection drops mid-match?
Your seat is held for 30 seconds — reconnect and you continue with your score intact.