Active Worlds was created in 1995.
yes you do need to download active worlds. I hope i helped
When Worlds Collide was created in 1933.
Seven Worlds was created in 1976.
Inner Worlds was created in 1976.
The Scoundrel Worlds was created in 2003.
Between the Worlds was created in 2003.
Evolution Worlds was created in 2002.
Of Worlds Beyond was created in 1947.
Of Other Worlds was created in 1966.
On the Plurality of Worlds was created in 1986.
Trion Worlds was created in 2006.
Three Worlds was created in 1955.