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The chronological order is: Halo Wars > Halo Reach > Halo CE > Halo 2 > Halo 3: ODST > Halo 3 > Halo 4 > Halo 5 > Halo Wars 2.

Halo CE, 2, 3, 4 and 5 = Main Story/Master Chief's Story.
Halo 3 ODST = Spinoff following an ODST squad.
Halo Wars 1 & 2 = Spinoff following Spirit of Fire & Spartan Red Team.
Halo Reach = Spinoff following Noble Team.

The spin-offs are for the most part their own self contained stories, Reach is linked to mainline entries partly but ODST links very little to mainline entries, Halo Wars 1 & 2 not so much at all IIRC. Honestly I'd say the order doesn't matter much and since you've already finished Halo CE then I'd say just carry on in order of release.

Last edited by Ryuu96 - on 01 January 2020