San andreas dating cheats
This is usually the case in RPGs where a player gets overwhelmed because he tried to finish the game too fast without leveling up his character correctly or even at all.
Side Note: Oysters All Oysters will make you able to infinitely breathe underwater.
This is mainly because weapons take a very long time to kill people at first due to low skill and the weapons being low tier, whereas later on you'll be able to kill most enemies within a second of targeting them.
Don't get discouraged by failing at the beginning, just make sure you save before each mission and try again, it will get easier later on.
Any game in the world can be completed without cheat codes, some harder than others but all doable, including GTA.
If people were able to finish Super Meatboy, Mario and Dark Souls without cheats then I can assure you GTA is passable :) It just requires you to pay attention maybe roam around a bit instead of just going from 1 main mission to another trying to finish the game as fast as possible.