After 10 years, hidden messages in Dark Souls have been found in the last place anyone thought to look

gamesradar.com:

Over 10 years ago, files for unknown Dark Souls messages were found in a text dump by Reddit user Retrogameaudio, who's now known as Illusory Wall, a prominent FromSoftware sleuth. Two days ago, on December 12, this cold case was finally closed with the discovery of two messages which did originally exist in the vanilla version of the iconic RPG.

Illusory Wall chronicled this saga in a new video about the Dark Souls Miracle-type spell Seek Guidance. This spell reveals nearby messages which would normally be hidden, and it was key to uncovering the two developer-made messages thought lost to time. One of them ended up being in the last place anyone thought to look, and they were especially difficult to find because FromSoftware apparently replaced them with different messages in post-launch patches before the original messages were even actually used. 

For over a decade, players have known the contents of those messages, but not their in-game location. One reads "try light," while the other advises you "try lightning." Illusory Wall consulted HotPocketRemix, the creator of an essential Dark Souls file unpacking tool on Nexus Mods, who found that the files in post-launch updates could be used to "patch existing messages. The interesting thing is that they 'replaced' those unused messages."

By restoring the default, pre-patch version of Dark Souls on PS3 – with help from Diamond42 – Illusory Wall tracked down these lost messages (following a challenge issued by Libralonix). One of them was in an obvious location: FromSoftware initially advised players to "try light" at the beginning of the infamous Tomb of the Giants, a pitch-black area past the Catacombs. 

The other message, "try lightning," could hardly have been more