Build worlds.
Play together.

• Monaco editor with autocomplete for every engine API
• Inspector-serialised fields with Header, Tooltip, Range and Entity decorators
• Coroutines, timers, events and cross-script calls
• Vector3, Quaternion, Mathf, Time, Input and Physics all behave as expected
• Event Sheets express the same logic as visual rows, and compile to a behaviour

export class Collectible extends Behaviour {
  @Range(10, 360) spinSpeed = 120

  onUpdate(dt: number) {
    this.transform.Rotate(0, this.spinSpeed * dt, 0)
  }

  onTriggerEnter(other: Entity) {
    const player = players.from(other)
    if (!player) return

    economy.addCoins(player, 5)
    audio.play('pickup')
    this.entity.destroy()
  }
}

• Dynamic, kinematic and static bodies whose mass stays exactly what you set, even after scaling
• Trigger volumes with Enter, Stay and Exit on any entity
• Fixed, hinge, ball and spring joints
• Per-surface friction and bounciness with average, min, max and multiply combine modes
• Raycasts, sphere casts and overlap queries with layer masks
• Ragdolls, and a per-layer collision matrix

onFixedUpdate() {
  const grounded = physics.sphereCast(
    this.transform.position, 0.4, Vector3.down, 0.6,
  )

  if (grounded && Input.GetButtonDown('Jump')) {
    physics.applyImpulse(this.entity, [0, 9, 0])
  }
}

• Walkability baked from level geometry, with agent-radius clearance
• Multi-level navigation — agents climb ramps onto stacked surfaces
• Obstacle carving for doors, lifts and debris
• Off-mesh links with automatic jump arcs
• Nav areas with costs, so agents prefer roads and avoid mud
• Agents tick on the server, so NPCs behave the same in multiplayer

export class ChaseAI extends Behaviour {
  detectRange = 18

  onUpdate() {
    const target = players.nearest(this.transform.position)
    if (!target) return agent.stop()

    if (target.distance < this.detectRange) {
      agent.setDestination(target.position)
    }
  }
}