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Knot Fun
Co-op arena shooter where players are physically tethered by a Verlet-physics rope that swings through the environment and deals damage to enemies on contact.
About This Game
Knot Fun is a 3D co-op arena shooter where two players are connected by a physically simulated rope. The rope is not merely visual — it collides with geometry and damages enemies on contact, turning cooperative positioning into the core combat mechanic.
Features
- Physics Rope: Verlet integration rope that swings dynamically and deals damage
- Co-op Play: Two or more players connected — coordination is required
- Wave Combat: Fight enemy waves with distinct types (melee, ranged, AOE, throw)
- Upgrade System: Procedurally generated card upgrades between waves driven by Google Sheets balance data
- Tension Feedback: Rope colour shifts from grey to yellow as players approach maximum distance
Technical Highlights
- Custom Verlet integration rope simulation with multi-pass constraint solving and sphere-based collision response
- Per-weapon possibility matrix prevents nonsensical upgrades via rejection sampling
- Multi-player force accumulation aggregates impulses per player before applying them to avoid same-frame interference
- Google Sheets CSV backend for live balance editing, parsed with a custom quoted-field CSV parser