His focus, he says, is split between one final personal milestone and one collective prize: reaching 1,000 career goals and winning the UEFA Nations League with Portugal.
"My goal is twofold: to score my 1,000th goal and to win the UEFA Nations League," Ronaldo said.
The forward is closing in on the mark, with trackers placing his tally near 980 competitive goals following a strike for Al-Nassr in late August. Reaching four figures would represent a milestone no player has previously achieved in officially recognised competitive matches.
Ronaldo's recall comes under a new manager. Roberto Martínez left his post after Portugal's last-16 exit to Spain at the World Cup in North America, with the Selecao eliminated by a stoppage-time winner in Atlanta after finishing second in their group. Jorge Jesus - who guided Ronaldo's club side Al-Nassr to the Saudi league title - was installed as his successor on a deal running to 2030.
Despite the change on the touchline, and the criticism he faced over his own displays at the tournament, Ronaldo has given no indication of when he will call time on his playing career.
"I don't know; I wish I knew the answer, but I don't," he said.
He was, however, adamant that his decision to keep playing had not been taken lightly, rejecting any suggestion that he was simply drifting through the end of his career.
"Yes, I always think through my decisions. I think about everything. So as you see me here, I've decided to continue," Ronaldo said. "I believe I can keep helping the national team."
The striker described his conversations with the federation and his new coach as reassuring, and pointed to his role within a squad now being rebuilt around a younger generation of players following the World Cup exit.
"I spoke with the president and the coach, and they are counting on me. I believe I can keep helping the national team - not just by scoring, but also because this is a new generation. But the most important thing is staying injury-free and continuing to score," he said.
Ronaldo has long been Portugal's talisman, and remains the nation's record scorer and record cap-holder by a distance, having featured at six World Cups since his debut tournament in 2006.
His contract at Al-Nassr runs until 2027, tying his club future to Saudi Arabia for at least one more season as he chases a landmark that would cap off the most prolific goalscoring career the sport has seen.