Alchemy5.pk3 is a collection of selected maps which replace MAP01 to MAP09 of Doom 2.
Here are the authors of the nine maps:

MAP01 - Originally Rel_E1M1.WAD by DJShrimpy, titled "Phobos Reloaded E1M1"+
MAP02 - Originally gzmarknight.WAD by Guy M. Babin, titled "The House That Sits in the Center"
MAP03 - Originally setebos.WAD by Captain Toenail, titled "Stebos Station"+
MAP04 - Originally bermuda.WAD by Gregory Dick, titled "Bermuda Triangle for Doom II"
MAP05 - Originally ma_shp.WAD by Ed C., titled "Smothered Hope"
MAP06 - Originally AT.WAD by Brad "Vorpal" Spencer, titled "Atomic Tomb"+
MAP07 - Originally shock.WAD by stphrz, titled "Shock 'Em Down"+
MAP08 - Originally LUNARAPO.WAD by Jimi, titled "Lunar Apocalypse"+
MAP09 - Originally bofp.wad by Memfis, titled "Beware of False Prophets"+

+Converted from Doom to Doom 2.

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