MechWarrior 2: Ghost Bear's Legacy

"MechWarrior 2: Ghost Bear's Legacy is the follow up expansion pack for MechWarrior 2, which gives the player a chance to play as Clan Ghost Bear. This expansion pack gives players access to fourteen new BattleMechs and a number of new weapons, plus twelve new missions in a number of new environments, such as outer space and underwater. New songs for the CD soundtrack are also added, continuing the tradition of high quality music that fits specific atmospheres.

If the player manages to master the 12 missions of the regular campaign without being killed or failing one mission, he enters the competition for a blood name. This additional campaign consists of 5 missions. Unlocking the additional campaign without cheating can be considered a difficult achievement."

Source: Wikipedia, MechWarrior 2: 31st Century Combat , available under the CC-BY-SA License.