Which planet is total recall largely set on?

The total recall largely set on Mars.

Explanation:

Mars is the fourth planet in the solar system in the Milky way galaxy. This planet was the planet which the astronauts wanted to discover and explore more about this planet.

But they did not want to travel to this planet so this was the reason why the total recall was set up on the planet of Mars because they wanted to know more about this planet. This was an alternative to not to travel to the planet but still know about it and explore it.

It is set on Mars. They wanted to experience Mars without have to travel there. So the answer is Mars.