His Legend Mode in Dynasty Warriors 4: Xtreme Legends takes place after Wei's defeat at the Battle of Chi Bi. Cao Cao retreats north and Cao Ren stations himself within Jiangling to guard his escape. He defends against the pursuing Wu army by concentrating on defense. His subordinate, Niu Jin, gives into Zhou Yu's taunts and recklessly charges from out of Wei's castle. However, he is soon surrounded and on the verge of defeat. To rescue his retainer and bring him back safely, Cao Ren decides to join the march. Worried that the castle will fall without him, the castle guards ask Cao Ren to reconsider. Even with their pleas, he hurries to Niu Jin's aid. While escorting his general back, Zhou Tai and Zhou Yu attack them. Cutting them down and having Niu Jin escape ends the conflict.
In Dynasty Warriors 5, Cao Ren is noted as a someone who was rough and frivolous in his youth. Joining his cousin to fight for the land's peace, he reinvents himself to become a disciplined general. He serves in all of Cao Cao's major campaigns and distinguishes himself by cutting an escape path for his lord after they lose Chi Bi. While they rebuild their defenses against the other forces, he is ordered to be one of the defenders for He Fei. When Guan Yu invades Jing Province, Cao Ren resists him at Fan Castle. Keeping the morale high with his determination, they repel the invaders but learn that Cao Cao passed away after their victory. Cao Ren continues to serve under his cousin's son, Cao Pi. As he helps repel Shu away from Chen Cang, the fall of the Wu happens simultaneously at He Fei Castle. Shu is soon struck down at Wu Zhang Plains and Cao Pi, pleased with Cao Ren's accomplishments, orders his other subordinates to follow his example. Seeing the land at peace, Cao Ren dismisses his soldiers and wishes for the hard won serenity to endure endlessly.
He shares his Legend Mode in the Xtreme Legends expansion with Cao Cao, Xiahou Yuan and Zhang He. Together, they struggle against the supernatural powers wielded by the Five Bushel sect. Cao Ren takes the western mountain path and worms his way up the summit. Upon reaching the second story level, Zhang Lu casts an illusion to conceal the staircases. As the only one who is close to the statues responsible for the trick, Cao Ren is given the task of destroying them, even when they explode as they shatter. He perseveres and the way to the enemy main camp is opened. After the battle, Cao Ren renews his goal to keep up the fight.
Dynasty Warriors 6 continues to have Cao Ren appear at He Fei, Fan Castle and Shi Ting. Still the leader of the Wei-Wu alliance at Jing, he keeps a vigilant watch over the main camp. In Special, he is also one of the Wei generals present at Ru Xu Kou. He defends one of the three bases on the Wei front.
Role in Super Smash Sisters
Cao Ren is an NPC general in Super Smash Sisters. He fights in battle with his buckler blade. he can also sometimes take his blade out to use with one hand. In the adventure modes, he sees chaos as evil and helps the girls fight.