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curl-6 on 20 October 2020
Of the ones I've played neither series really has a bad game, but that said I haven't played Halo 5 and what I've seen of that one doesn't impress me. Doom 3 was probably the least excellent doom entry but it's still a good game.
These two are probably the #2 and #3 best FPS franchises ever in my book, with Bioshock taking #1.
