Three, actually! They even had a bit of continuity. In the first game you have to escape the embassy by plane before a bomb goes off, in the second your plane c

Three, actually! They even had a bit of continuity. In the first game you have to escape the embassy by plane before a bomb goes off, in the second your plane crashes on a volcanic island and you have to escape by submarine before it erupts, in the third your sub crashes into a glacier and you have to escape by rocket before you freeze to death. Or something like that, it's been a while.