Get ready to conquer every achievement in the classic game, Marathon, with this 100% achievement guide. If you’re a seasoned player, I suggest playing on total carnage difficulty since one of the achievements is dependent on it. However, if you’re new to the game, stick to normal difficulty and try for total carnage in a future playthrough. Keep in mind that entering anything into the LUA console will prevent you from earning achievements, so if you have previous saves with console inputs, you’ll need to start a new game. Let’s dive in and unlock all the achievements Marathon has to offer!
