There are glitches known in GOW 2018, but they are less than 2min time save altogether, which relatively doesn’t matter. What’s more, most of them have been patched already. On unpatched version, the achievement Instant Reaction only gives 650 compared to 3500 exp on current patch. That’s 75 times of exp exploit to get enough exp, compared to 15 times on current version. The time it saves is less than it costs. Also there are glitches you don’t want on unpatched version. You don’t want them occurs in an 8h speedrun. So I won’t try glitched run unless there is 10+ time saving glitch discovered.