Probabilities for EITC Defense rewards by wave are detailed below.
Special Defense Reward Item Probabilities per 10-Minute Intervals
| Stage | Turret Parts | Chance | Pirate's Treasure Map | Pirate's Treasure Map [Uncommon] | Chance | Training Tool | Chance | Invitation Letter | Chance |
| 1 ~ 10 | 9 | 30% | 1 | - | 30% | 5 | 30% | 1 | 10% |
| 11 ~ 20 | 14 | 30% | 1 | - | 30% | 5 | 30% | 1 | 10% |
| 21 ~ 30 | 28 | 30% | 2 | - | 30% | 5 | 30% | 1 | 10% |
| 31 ~ 50 | 65 | 30% | 3 | - | 30% | 10 | 30% | 1 | 10% |
| 51 ~ 70 | 103 | 30% | 4 | - | 30% | 10 | 30% | 1 | 10% |
| 71 ~ 100 | 160 | 30% | 5 | - | 30% | 10 | 30% | 1 | 10% |
| 101 ~ 150 | 254 | 30% | 6 | - | 30% | 15 | 30% | 1 | 10% |
| 151 ~ 180 | 310 | 30% | 7 | - | 30% | 15 | 30% | 1 | 10% |
| 181 ~ 200 | 348 | 30% | 8 | - | 30% | 15 | 30% | 1 | 10% |
| 201 ~ 250 | 442 | 30% | 9 | - | 30% | 20 | 30% | 1 | 10% |
| 251 ~ 300 | 536 | 30% | 10 | - | 30% | 20 | 30% | 1 | 10% |
| 301 ~ 350 | 600 | 30% | - | 2 | 30% | 40 | 30% | 1 | 10% |
| 351 ~ 400 | 600 | 30% | - | 2 | 30% | 40 | 30% | 1 | 10% |
| 401 ~ 450 | 650 | 30% | - | 3 | 30% | 60 | 30% | 1 | 10% |
| 451 ~ 500 | 650 | 30% | - | 3 | 30% | 60 | 30% | 1 | 10% |
| 501 ~ 599 | 650 | 30% | - | 3 | 30% | 60 | 30% | 1 | 10% |