On & Off

On & Off is a turn-based deckbuilding roguelike where you place magical cards on a grid and connect signals. Cards stay on the board after use, switching between ON and OFF states; when a card turns ON from OFF, it activates its effect. Your placements and the signal paths between cards determine how often you can reuse their effects.

Reactivate your cards

When a card turns ON from OFF, it activates its effect and sends signals to nearby cards in the directions shown by its arrows. A card receiving a signal switches between ON and OFF. Only cards that switch from OFF to ON activate their effects again and send signals onward.

Repeated activations can stack effects: activating a defense card twice applies its defense twice, while activating an attack card five times makes it a five-hit attack. You can reuse attack cards to build damage, trigger defense cards again to block incoming attacks, or prepare the board for another chain.

Build signal chains

Place cards so signals travel from one to the next, expanding a single activation into a chain. Card positions and directions shape the signal’s route, from short, reliable chains to flows that cross the entire board.

Shape your deck

Gain new cards as you fight and build a deck with cards that work well together. Choices change with every run, letting you create a deck that repeatedly awakens one key card, activates many cards in a chain, or builds up cost to unleash it all at once. You can also prepare the board for a major activation on your next turn.