The battery is an essential componant in achieving the good ending for nmo_subside. It can be obtained at the very beginning of the map after round start by completing the switch puzzle.

After all of the breakers are pointed upwards the battery will charge for 30 seconds and drop free. Players must then carry the battery all the way to the end of the level and place it in the large white extraction van before it attempts to drives away

If the player succeeds in placing the battery into the van it will result in players being teleported to the credits, score and true extraction zone.

If the player fails to bring the battery before it attempts to drive, players will be overwhelmed with zombies and the screen will fade to black.

Here is a first person view of myself completeing the puzzle to provide visual representaion.

The first thing you are going to want to do is start up your own game by creating a server and load up your latest version of subside. Open console (enabled within the advanced key map option) and enable sv_cheats 1 and ai_disable. this will allow you to practice without being bothered by zombies.

The goal is to have all of the levers pointing up by pressing buttons in a specific order

If the puzzle was written out in number form, 1 being the switch farthest left, it would look like this:

121 3 121 4 121 3 121 5
121 3 121 4 121 3 121 6
121 3 121 4 121 3 121 5
121 3 121 4 121 3 121 7
121 3 121 4 121 3 121 5
121 3 121 4 121 3 121 6
121 3 121 4 121 3 121 5
121 3 121 4 121 3 121 8
121 3 121 4 121 3 121 5
121 3 121 4 121 3 121 6
121 3 121 4 12