Board the freighter and you will come across a weapons locker next to a watertight door. A control panel to open the next door will also be in that small room.

Before operating the control panel, equip the Dethex Launcher and use the secondary function to put a guided grenade (push the GREEN ’A’ button to jump) through the grate maze in the wall and floor of the room.

Use the bomb to blow open the locked watertight door. Inside, you can get a weapon tech pick-up and revert a message for this achievement.

Shortly after you pick-up the RLS-7 in the game, you cross a bridge (which overlooks a highway bridge where some enemy soldiers battle giant mutant spiders).

On the other side of this foot-bridge, use the TDM to revert the lockers in the room and reveal a note inside one of them.

The note is written in the familiar style of everyone’s favorite cultural tour-guide from Kazakhstan (except perhaps, for the actual Kazakhstan).

Immediately after upgrading the TMD to its final level (where it does not use TMD Energy for all attacks), break the vent behind the upgrade machine. The crawlspace leads to this easter egg and some game related items.

Ending 1: After disarming Demitov, turn around and use the TMD on the portal. Neutralize past Renko (headshot) for this ending.

Ending 2: After disarming Demitov, turn and neutralize Barisov for this ending.

Ending 3: After disarming Demitov, neutralize both targets for this ending.