JEFF is a fast-paced co-op horde shooter and roguelite survival game where you fight endless waves of enemies inspired by everyday frustrations. This is a chaotic bullet heaven experience where “daily life demons” swarm the map, forcing you to react fast, move smart, and survive against overwhelming odds.

Each run is built around progression and power. You unlock and upgrade a wide variety of items that stack together to create strong, sometimes broken builds. As you survive longer, your character scales into a screen-clearing force, turning a simple auto shooter into a full chaos simulator. The core loop is all about surviving, upgrading, and pushing your build to its limits.

JEFF is fully playable as a solo experience or as an online co-op game. Play alone and test your skill in a pure survival run, or team up with a friend and combine builds for even more destructive results. Co-op adds a new layer of strategy as you balance positioning, enemy control, and shared survival in increasingly intense waves.