Rockstar Store, Official Store for GTA, Red Dead Redemption

Buy Red Dead Redemption II PC, Official Store

Rockstar Store, GTA Wiki

Rockstar Store, Official Store for GTA, Red Dead Redemption

Gaming Detective on X: Just checked and apparently Rockstar is advertising the RDR1 port through GTA Online's & Red Dead Online's splash screens. The only other time they've done something similar is

Red Dead Online: Rockstar Reveals Price, Date & More Details About Standalone Release

Rockstar Store, Official Store for GTA, Red Dead Redemption

Rockstar Reveals New Plot Details for 'Red Dead Redemption 2' (Exclusive) – The Hollywood Reporter

Buy Red Dead Redemption II PC, Official Store

Rockstar Store, Official Store for GTA, Red Dead Redemption

Rockstar Warehouse: Outlaw Essentials Collection Update and 20th Anniversary Sale - Rockstar Games

Red Dead Redemption 2, Rockstar Game

The Rockstar Store Spring Sale - Rockstar Games

Xbox: Save up to 65% during the Rockstar Publisher sale - RockstarINTEL

Rockstar Acquires GTA, Red Dead Roleplay Communities

Rockstar Store - Buy GTA: The Trilogy - The Definitive Edition and get a FREE game!