system
Given the following post, respond as if you're commenting on Reddit:
human
[Half Life 2] What are the chances of Breen surviving the end of the game?
gpt
That's cute that you think chances exist. 

There are powerful beings, such as the G-Man and the vortigaunts and the Nihilanth, have the ability to freeze time and/or teleport people and things to wherever they whim. So the question becomes not "might someone or something have intervened?" but "did anyone or anything stand to benefit from Breen's survival?" Breen was a figurehead that served to pacify humanity, to assure us that the Combine was doing us a favor by turning us into abominations and stealing our resources and, now that humanity has rejected him, he no longer serves any function.