Another Shadow of the Colossus secret has been discovered, and solved! Players had been wondering what the mysterious Gold Coins unlocked. These are scattered through the PS4 remake version, and weren't in the original game.
Spoiler warning!
It now tunes out that there are 79 gold coins to collect in Shadow of the Colossus and finding them all unlocks a weapon called Sword of Dormin. With this weapon equipped, damage is increased and health regeneration is reduced.
However, once you've got all the gold coins, there's still a bit of work to do to find the Sword of Dormin! Luckily, PS4Trophies has created a video detailing exactly how you unlock this secret. You can fast-forward to approximately the 2 hour 20 minute mark to see the awesome discovery!
How To Get Sword of Dormin in Shadow of the Colossus
Shadow of the Colossus is available to download now on PS4.