Free Kazimir

1. Obtain a Kazimir: You need to have a Kazimir device in your possession to start the process.

2. Throw the Device: In the executive suite, notice the large globe thing, and go up the walkway to the balcony behind it. throw the kazimir into the center sphere 

3. Collect Souls: The Janus logo will transform into a purple soul box. You must fill it with souls by defeating zombies nearby.

4. Get a Free Kazimir: Once the soul box is full, it will drop a free Kazimir for you to pick up.

the number of souls required increases with each use, making the process take longer. The Easter egg is infinitely replayable.