June 2000 issue of this magazine. This early version of the game has most of the levels and all the characters playable. Available only during the E3 convention held in May of 2000, you cannot purchase this version and I don't know how to obtain it. Please don't ask me how to get a copy. While I don't know of exact versions, there are probably many different beta versions of THPS 2 around.
Some versions are more complete than others, some have more glitches.
I don't know how many versions exist. A beta version of the game is an early version used for testing. While the general public shouldn't have access to these versions, people can get their hands on them through various illegal sources. I do not know how to obtain this version of the game either. Please do not email me asking.