Red Dead Redemption is another open world action-adventure game developed by Rockstar Games that features a Western-themed setting and a similar narrative structure to Grand Theft Auto IV.
Sleeping Dogs is an open world action-adventure game that takes place in Hong Kong and features a similar combat system, driving mechanics, and crime-themed story to Grand Theft Auto IV.
Saints Row 2 is an open world action-adventure game that is known for its over-the-top humor, customization options, and cooperative mode, and is often compared to Grand Theft Auto IV for its similar setting and genre.
Mafia II is an open world action-adventure game that is set in the 1940s and 1950s and follows the rise and fall of a mobster in a fictionalized version of New York City, similar to Grand Theft Auto IV's Liberty City.
Watch Dogs is an open world action-adventure game that incorporates hacking elements and a futuristic setting, and has been compared to Grand Theft Auto IV for its realistic depiction of a large city and its cinematic story.