The most notable addition was the new airship hangar.

Another notable addition to the museum in the 1980s was the acquisition of historic buildings, now situated on the property.

The most notable addition in this set was the introduction of the objective mechanic.

Following minor improvements in 1963 and 1977, the auditorium was renovated extensively in 1990, with the notable addition of an external modern glass concourse and lobby.

The other notable addition in this set were defensive shields, cards that were separate from your 60-card deck and were designed to counter abusive strategies.