This is the Undeadorado Halloween Update for A Fistful of Gun
Spirit Totems- Will protect nearby enemies from damage.
Possessed Indians- As a result of a spirit totem, these enemies are invulnerable to your shots until your destroy the totem.
Bear Riders- First two stage enemy, you shoot the rider off and a bear will charge you afterward, will require some management so you don't agro all the bears at once.
Possessed Chickens- Fast moving creatures that leap toward you when they get close. They will occasionally spawn in packs.
Cultist Hog Riders- Similar to the bear riders, the hogs move around quite unpredictably and have a two stage approach also. Hogs also spawn separately in packs.
Spirits - Will appear to shoot and then fade out afterwards, you will have to do a lot of guess work to nail them down. They appear and reappear at random when they don't have you targeted.
Super Bears- Giant bears, will act as a tank for the bear horde, they will charge you within a set range, aside from that they are slow and lumbering, keep your distance and shoot. Standard bears will also have the charge mechanic added via the patch.