The Long Way Home

M4 - The long way home is the final mission in  Deus Ex: Human Revolution - The Missing Link DLC.

Visit Quinn's shop to get supplies (optional)
If Adam managed to save both the prisoners and Dr. Kavanagh, Quinn will applaud him enthusiastically and reveal that he left some supplies in his shop in the Maintenance Area before escaping Rifleman Bank Station to help against Pieter Burke in the upcoming confrontation. Getting there can be difficult due to heavily increased security forces and bots and some corridors being covered with frag mines. Also, Burke will taunt Adam continously via the speaker system, which can be unnerving over time. Fulfulling this objective will net 2400 XP.

Confront Burke
Burke is hiding inside a control room in Loading Bay 3. To reach it, Adam will have to traverse well-guarded Loading Bay 1 and 2. There is a shortcut however, by hacking the door to Loading Bay 2 (Level 5) and sneaking to the left corner to the corridor leading to Loading Bay 3.

Defeat Burke and his men
Burke is guarded by a heavy and some medium guards, two snipers and a 80-X Boxguard. Burke himself is quite easy to take down, either lethally or non-lethal, i.e. by throwing a single gas grenade into his control room (on the Give me a Challenge difficulty).

Go to Loading Bay 2's docking platform
Adam just has to head back to the Zhen Zhu's cargo ramp just outside of Loading Bay 2 to find Garvin Quinn waiting for him. After a short conversationin which Quinn discloses himself to be the mysterious voice from the previous missions. He also admits to having utilized Keitner and Adam Jensen for his and his anonymous employer's causes before sending Jensen to another Belltower secret facility in another stasis pod aboard another cargo ship. The ending sequence shows a freight helicopter carrying the container with Adam's stasis pod to the ship.