Sigerous (SGM) comes from a Russian development team that's headed up by Nikolay Bolotov (GeJorge), It was in development for many years and in that time a number of excellent versions were released. The plan is to upload a selection of All-in-ones that span from SGM 1.7 up to SGM 2.2. Note: I'm not one of the mod's developers, my involvement has been through doing the English translations from 1.7 Geonezis on. Each mod will come with a read me that gives you any relevant info you'll need and a list of known contributors.
IMPORTANT: Add Patch linked below before starting a new game, This All-in-one is built around a Russian version that includes SGM 2.0 Geonezis, Atmosfear 3 and Abs Nat 3. Artwork by L.S.T.
patch The Russians read me gives info on extra parts such as some textures that were used that are from Misery (sky). It has had some fixes and a rewritten translation added. The read me's contain credits.