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The SAC-series has it's own separate universe and is more of a crime series where the movies are more philosophical. Ghost in the Shell/2.0 and Innocence are set in the same universe, and I would recommend to watch them first as they have the strongest story and production values. The GitS movies, SAC-series and Arise OVA are all different interpretations of the source material/manga. and should probably be watched directly after it. 2nd GIG and Innocence go in relation to each other, because they are both set in 2032. The only unclear part is about where S.A.C.
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Ghost in the Shell 2: Innocence (set in 2032).
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2nd GIG, altered to focus on both the Individual Eleven investigation and the relationship between Hideo Kuze and Motoko Kusanagi Individual Eleven, a feature-length OVA which retells the events of S.A.C. The Laughing Man, a feature-length OVA summary of S.A.C. Ghost in the Shell: Stand Alone Complex (set in 2030).Ghost in the Shell (set in 2029) from 1995 or its 2008 remake Ghost in the Shell 2.0.
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