Two players are required for this easter egg. Have both player go to one of the two buttons shown in the video below in the Rogue Transmission map, then have both players interact with the button at the exact same time to trigger the easteregg. If done correctly, a high pitch beep will sound when activating both switches at the same time. Then, eventually one of two dinosaur soundbites will play. You will hear trees falling down and either some grumbling or a roar. You may also see some trees move while the soundbite plays if you look to the right area of the map. Additionally, the soundbites may continue looping every couple minutes after being activated.