No, you can't use tweeks.
Just stay as far away as possible from him and when you shoot the sap, use the pistol.
Yes, a few glitches are available online, such as getting out of the map, but they are slowly being patched. In story mode, tweaks are available to buy with in game money in an in game store, for things such as one shot kills, and infinite ammo. Also on crushing difficulty, tweaks are not allowed, but there is a glitch to still use them.
This island is uncharted.
Ships should not travel in uncharted waters, because they might get lost.
there are no cheats for this game
once
You can't do that anymore.
hopefully :) and if they do they should use James Cameron
He used it as a method of: crushing hope crushing aspirations crushing thought, and making the Soviet government all-powerful (no higher or independent authority).
we should face any difficulty with courage
This has caused me great difficluty.
With difficulty