Everyone is so nicely dressed for the holiday of Halloween! Here's a rundown left to right of who's who.

Austin - Nathan Explosion - Metalocalypse
Aruseus - Beat - Jet Set Radio
Darrel - Kon - Bleach
Zarel - Joseph - Arfenhouse
TJ - Professor Chaos - South Park
Fang - Francis - Left 4 Dead
June - Morrigan - Darkstalkers
Lucian - Strong Bad - Homestar Runner (Lucian was only BLU Engie for PCA)
Troy - Dirk the Daring - Dragon's Lair
Derek - Jaques - Spyro the Dragon (Thank you  -Blackout- for inspiration)

Happy Halloween! Oh, and that is Austin's skull mask being used for a jack-o-lantern.