Arrowslits is a University technology. Watch Towers +1, Guard Towers +2, Keeps and Donjons +3 attack.
- Building: University
- Age: Imperial Age
- Cost: 250 food, 250 wood
- Research time: 25 seconds
- Available to: 30 of 56 civilizations (26 do not have it).
Adds attack to towers and Keeps. Mostly used in defensive games with many towers.
Figures from the game data for Update 185872 (September 2026), at the time of publishing.