Heartjack

Heartjack is a stylized melee PvP game that runs in the browser and pits players against each other in close-quarters combat. It sits between action and strategy, so a match is about swinging at the right moment as much as it is about choosing where to stand and how to answer an opponent.

The creator says the project was an attempt to push what AI can produce, and that ambition covers the character models, the animations, the art direction and the overall attitude of the presentation. The look is deliberately stylized rather than realistic, and the visual identity is a central part of what the game offers.

It was entered in Vibe Jam 2026, where it placed 96th out of 945 entries. The creator built it in Three.js using Codex, and the multiplayer focus means every encounter is against another person instead of scripted enemies.