Event buttons...
	Multi-player levels...
	Silver medal bonuses...
	Steam Achievements...

Use the "Event" button on the indicated stage to get the corresponding result.

Woods: Rain slows down zombies; torch is extinguished and cannot set zombies on fire, but can still scare them; zombies that are already on fire remain burning.
Cemetery: Divine ray kills zombies.
Suburbia: UFO abducts zombies.
Drive-In: Plays music that makes zombies dance briefly.
Military Base: Line of TNT drops down.
Secret Lab: Three lasers rotates around the middle of the level that will kill everything.

Earn a bronze or better medal in a single player level to unlock it in multi-player mode.

Earn the indicated number of silver medals to unlock the corresponding bonus.

Zombie Vision: 1 silver medal.
Art: 4 silver medals.
Sketch Vision: 12 silver medals.
Sepia Vision: All silver medals.

Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.

Achievement	How to unlock
Brain Surgery	100 Brains sucked.
d6 Admires You	All Gold medals.
d6 Commends You	All Bronze medals.
d6 Respects You	All Silver medals.
Dynami-Te-He	1000 Zombies blown up.
Extinction	100,000 Zombies killed.
Friend of Bruce	All levels unlocked.
Friend of d6	All Developer medals.
Graduation	Complete zombie academy.
Hot To Trot	Last 30 seconds with 50+ zombies on fire.
Murder On The Dance Floor	1000 Zombies sent dancing.
Paint The Town Red	Fill the screen with the maximum amount of blood on any level.
Red Shirt	Kill the away team Zombie.
Texas Style	100 chainsaw combos.
Tourist	All Arcade levels unlocked.