Help Freeze or Leave Him to Waller
Batman The Enemy Within Episode 4 Choices and Outcomes
After Mr Freeze gets infected with the Lotus virus, Iman suggests that he would be a good person to interrogate to find out where Harley might be. However, Waller turns down that suggestion immediately. Batman decides to talk to him anyway, and Mr Freeze says that he’ll reveal what he knows if Batman agrees to turn down the temperature in the airlock to give him a chance to survive and try to fight the virus.
If you promised him that you’d do so, he’ll give up the information. After that, you’ll still have a choice to either turn down the temperature or walk away from him. Turning down the temperature will cause Mr Freeze to be grateful to you as the airlock fogs up.
If you walk away, Mr Freeze will yell at Batman angrily, and call him all sorts of names. He doesn’t die, but he’ll certainly remember this.