One version is common, at least one other version is rare
 Original game concept by Alexey Pajitnov. Coding by Gary W. Milliorn.
 According to the game manual, WELLTRIX is an Amiga conversion of WELLTRIS by Spectrum HoloByte. It has most of the features of the original game except for the pictures and the copy-protection quiz, and adds several user-defined features (e.g. colours, sounds).
 Magazine Publisher: Amiga Power no. 8, Dec 1991 [downloadHERE].