Defense research: costs, timers and effect
Short answer
Defense research makes your towers hit harder.
What it does
Each level of Defense adds to every tower's damage, in raids and against wild hordes and the blood moon.
Levels and upgrade costs
| Level | Cost | Time | Serum Lab level | Effect |
|---|---|---|---|---|
| 1 | 40 scrap, 25 serum | 30 min | 1 | Towers +15% damage |
| 2 | 160 scrap, 300 serum | 3 h | 2 | Towers +30% damage |
| 3 | 480 scrap, 550 serum | 8 h | 3 | Towers +45% damage |
Tips
- Research Defense if you keep losing gates at night.
- Defense makes every tower better at once, so it's worth more the more towers you have.
Questions
How much does Defense research cost?
Level 1 costs 40 scrap, 25 serum (30 min), level 2 costs 160 scrap, 300 serum (3 h) and level 3 costs 480 scrap, 550 serum (8 h). Each level needs the Serum Lab at that level.
Numbers come straight from the game's rules and update with every release.
Go deeper
Related pages
WatchtowerThe Watchtower shoots raiders and wild hordes on their way to your gates, and lets you see further across the map.
Serum LabThe Serum Lab brews serum, the rarest material, and runs the four research tracks.
Road gateEach of the four roads into your village ends at a road gate. Raiders must break it to reach your keep.