Somewhere out there, a gamer loudly proclaimed, “No game developer will ever come up with a worse save system than limiting them to checkpoints!” Then Kingdom Come: Deliverance came along with its drunken method. Perhaps seeing this as a challenge, Konami declared, “Hold my beer” and proceeded to trump them all with the save system in Metal

Source: Hot Hardware – Konami Shamelessly Charges Metal Gear Survive Players For A Second Save Game Slot