Live preview · Open Beta July 2026

How it plays

Stream Siege is tower defense where the towers are people — every unit on the board is a real viewer of the stream. Here is the whole arc of a match, from tapping Join to the final leaderboard.

The arc of a siege

  1. 1

    🎮Tap Join

    Open the panel on the stream, pick a class, and you are in — no install, no account, nothing to download. You play as yourself, under your own name.

  2. 2

    🏰Hold the line

    Enemies march the path toward your base. Your unit attacks on its own — you choose where to stand, when to relocate, and when to spend your mana on spells.

  3. 3

    🃏Draft your build

    Between waves, upgrades unlock. Grab a stat boost, take a weapon or talent that bends your class in a new direction, or Empower — sacrifice power now for bigger picks later.

  4. 4

    💥Unleash the Siege

    Your team charges a shared Siege meter as it fights. Trigger it to send a souped-up champion crashing into the rival stream’s defenses — with your name on it.

  5. 5

    🗿Race the boss

    It all ends at the Rock Golem — a boss both teams fight at once. Break it apart faster than the other community and the pressure lands on them. First base to fall loses.

  6. 6

    🏆Take a bow

    Every match ends with awards — top damage, clutch saves, siege mastery, and more — plus a full leaderboard so your chat can argue about who really carried.

The classes

Pick your class when you join, then shape it with the upgrades you draft. Mix your team’s roles to counter what’s coming.

Archer portrait
Archer
Single-target precision

Long range and heavy, accurate hits. The dependable backbone of any tower — and a menace to anything big.

Rogue portrait
Rogue
Ricochets, strips armor

Knives that bounce from enemy to enemy and shred armor, so everything the team hits, it hits harder.

Fire Mage portrait
Fire Mage
Area-of-effect burn

Fireballs that splash across the pack. The bigger the crowd, the better the Fire Mage looks.

Frost Mage portrait
Frost Mage
Slows and freezes

Ice that slows, roots, and freezes. Frost Mages decide what reaches the base — and what never gets close.

Alchemist portrait
Alchemist
Poison and damage over time

Toxins and plagues that melt enemies over time and spread through tightly packed waves.

Bard portrait
Bard
Buffs the whole tower

Plays for the team — an aura that makes every ally around them stronger, with a flourish saved for the big moments.

For streamers

Stream Siege is a Twitch extension — your community plays from a panel right on your channel while the battle renders on your stream. No downloads for your viewers, and the match runs whether five people join or sixty. Shortly after the Open Beta begins, any streamer will be able to add it to their channel for free — and streamer-vs-streamer battles arrive with that rollout, so you can pit your community against another stream’s. Setup guides land in theDiscord first.

Open Beta details →