Shadow of the Colossus remake uses 'original game code

This was confirmed by Bluepoint Games.

The Shadow Of The Colossus Remake Is Stunning, But Does It Do The OG Justice? - Supanova Comic Con & Gaming

Shadow of the Colossus Basics - Shadow of the Colossus and ICO Guide - IGN

Ico and Shadow of the Colossus make triumphant debuts on PlayStation 3 - CNET

Secret Sword Discovered in 'Shadow of the Colossus' Remake

The creators of ICO and Shadow of the Colossus are teasing their next project

Shadow of the Colossus' Review: Should You Buy Video Game Remakes?

Shadow of the Colossus' Remake beginner's guide

Ico and Shadow of the Colossus make triumphant debuts on PlayStation 3 - CNET

Shadow of the Colossus' remake is missing something vital

SHADOW OF THE COLOSSUS on PS4 system introduces the awe of its unforgettable world and towering creatures to a new generation of gamers, while

Shadow of the Colossus - PlayStation 4