Normal , True Vault Hunter Mode , and Ultimate Vault Hunter Mode are the playthrough in order of first to last . He made a typo . He mean ' t COM as in Class Optimization Modules aka Class Mods . As for the Grog , you defintely don ' t need it at this point . Normal is easy on purpose . It ' s meant for you to get used to the world , the mechanics , and enjoy the story . Don ' t stress gear , especially when you don ' t understand the game yet . There will be an overwhelming amount of time for that later . <| sep |> This is why when travelling very fast , or when in a very powerful gravitational field , outside events seem to pass quicker . This is wrong . Time dilation is a symmetrical effect . When you move fast relative to a certain frame of reference , you see clocks resting in that frame of reference as going slower .