| Value | Key |
|---|---|
| 0 | None |
| 1 | Red key card |
| 2 | Blue key card |
| 3 | Yellow key card |
| 4 | Red skull key |
| 5 | Blue skull key |
| 6 | Yellow skull key |
| 100 | Any key |
| 101 | All keys |
Add 128 to any of the above values if skull keys and key cards will both work equally well for opening a lock.