Beware the Spinning ♥♥♥♥♥.

A Female gender symbol. - Female
3 Short straight lines intersected by a long straight line. - Antenna
A Diamond outline. - Diamond
A star that looks like a asterisk (*) - Asterisc
A crescent moon - Cresent
A Circle with a straight line cutting it in half. - Circle with line
A Circle with a small dot in the middle. - ♥♥♥♥♥
3 Dots arranged in a triangle. - 3 dots
A Triangle outline. - Triangle
A "D" shape - D
A "T" like shape that has a line through it. - T
2 arcs crossing - Fish

To make it easier with this easter egg too (we have some members who want the achievement, this is hardest step), step on tile, look at it, step off of it and then tell partner what it was, but remember to not stand on any tiles while the other person is looking. the other 2 people in the game can either hang out in spawn or down in the caves, helps keep the zombies off the people doing tiles.

When Fire zombies come and the gas hasn't been lit yet, RUN. Stay clear of the fire zombie until you are done with it, otherwise you might get stuck playing round after round waiting for another...