Post-Invasion File:Isaac Kleiner and
Sebastian Wolfe were barely able to escape
Black Mesa before the Union overran it. Few were so lucky. They made it as far as Arizona, but it didn't matter. The entire planet was under the control of the Universal Union's forces. Near the end of the Seven Hour war, they were captured and processed with their fellow surviving humans by the Union, and sent to the various re-established cities across the planet. Kliener was at first separated from Doctor Wolfe, and spent many years in the ruined City 3, formerly known as Chicago.
As the Union began their strip-mining campaign, everyone was moved easterly. Kliener spent several more years in City 14 in western Europe before his final transfer to City 17, somewhere on the western boarder of Russia.
Over the years Kleiner had managed to keep a few of his possessions hidden from Overwatch security; his old labcoat and, more importantly, his scientific journals from Black Mesa. He had been looking for a way to undo what he had helped cause, but Kleiner was no revolutionary or orator, and in the more western cities it was near impossible to conduct any secretive business without being caught. But in the tight winding streets of City 17, the Overwatch could not see everywhere.
Over his first year in City 17, Kleiner made contacts and managed to covertly get in touch with local Resistance members, specifically a young smuggler named
Joseph Duepree. Joseph revealed that Doctor Wolfe was infact still alive, and a key
Resistance member. With Joseph's help, Kleiner contact Wolfe, who had taken up residence outside of town in an abandoned hydroelectric dam station, which he had converted into a lab. Kleiner wished to join him, but the route was out of the city was too treacherous. Instead, they devised a plan - they would continue their localized teleporter research and create a system where citizens could be taken out of town in safety.
Kleiner set up his lab in the city's massive, ancient underground sewer system, where Joseph and other several other rebels had hideouts as well. Kleiners lab, which was built as a massive expansion to Joseph's own safehouse, was operational within a year, after which Kleiner started fervently working on his project, utilizing Deupree's skills as a smuggler to get him the necessary supplies.