Slot Theory

Slot Theory is a roguelike tower defense game where you build a defense one card at a time. Each wave offers one pick from five cards: add a tower or change one you already have. Your choices remain part of your build as the waves grow harder, and six tower slots make placement important.

Shape each defense

You can stack modifiers, combine towers and trigger Surge events. Waves run automatically while you choose targeting modes and time your operator’s ability. Choose an operator, develop your defense and face the boss on wave 20.

Solo or co-op

Play alone or defend a shared lane in online co-op for 2–4 players. Each player drafts their own build and chooses their own operator, while the group shares its lives.