Keep in mind with Metal Gear that you need to play the games in order of release, not chronologically. It’s sort of a Star Wars prequels situation where the prequels spoil the sequels.
Here’s the proper order to play them in:
1 - 2 - 3 - 4 - Peace Walker - V
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I’ve been meaning to play through the Dark Souls series, just started Bloodborne and I’m having a blast!