These come in the form of salvage from previous missions.

Unlike previous missions, the player is not allowed to continue if he loses all of his lives at this point.

"As you know, we have had reason to regret doing so in each of the previous missions."

In all of their previous missions, radio had been unknown and, therefore, completely secret.

Same rules as the previous Sister's mission, but with more sidings.

The aircraft had been flown a grand total of 6 previous missions, this being the 7th.

I am one of five survivors from our previous mission, sir.

On previous missions, a certain amount of travel has been involved.

The organization has sent two previous missions to Chechnya, both of them brief.

Ryumin had completed a previous mission only eight months before.