Talk:Orokin Derelict/@comment-195.14.205.167-20131107041320/@comment-98.222.70.241-20131107182213

You don't need to bring any keys to run the mission.

To enter the vault you need the correct key.

There are four different keys to match the four different locks.

Each player may bring only one key.

These things being so, bringing only 1 key gives you a 25% chance of having the correct key. The other 75% of the time, the vault will be locked with a different key and be unaccessible.

If all four players in a full team bring different keys, then every possible lock an be openned.