Acid spider: a new green spider, as fast as the werewolf and as tough as the heavy. It bites when it reaches you and, while it is still coming, stands still and spits three acid blobs in a small fan. The blobs fly straight, so keep moving. It shows up in waves and patrols from wave 4. A hit from its acid splashes green.
New effects: boss fireballs, meteorites, patrol and shrine drops, spawn portals, healing, bullet hits, the flamethrower, shrines and the lava ponds all have new, richer effects, with new sounds for fireballs, meteors, portal spawns and boss deaths.
Boss deaths: the golem, the Wyvern and the Demon Lord each have their own death sound that every player hears.
Demon Lord warning: when the Demon Lord wakes at a shrine everyone gets a message and a sound.
Blood: players and bots show blood splatters when they are hit, a skull effect when they go down and a fire effect when they die, and everyone sees them.
Level-up and shop sparkles: buying a skillbook or an XP pack, and picking a perk, now show the same rising yellow stars as drinking a potion.
Wyvern drops: the Wyvern now also drops enemies from the sky beside its meteors.
Wyvern and Demon Lord fireballs: they now curve a little towards the nearest player, fly twice as far, are shot from much further away (the Wyvern from 1600, the Demon Lord from 1400) and 30% faster, and are 30% quieter. A Wyvern or Demon Lord starts its meteors and enemy drops only when a player is within that range.
Meteorites: they fall from closer, their rock is visible for longer and they look and sound new. A patrol and a meteorite no longer fall at the same moment.
Patrols and shrine drops: the drop is a purple glowing ball, 30% smaller, with no stars in the landing burst, and it falls from half the distance.
Werewolves now appear from wave 2 and harpies from wave 3, and patrols bring harpies from wave 3.
Boss, portal and crate rewards: killing a boss, destroying a field portal and picking up a supply crate now give their gold and XP split evenly between all players and bots, whatever the shared gold setting says.
Messages: the patrol, portal, crate, Demon Lord and boss warnings are shorter.
Shrines: the temple shrine no longer has its archway gate, and a yellow magic glow rises from every shrine.
Bazooka rockets leave a sparking fuse tail and make a rushing sound while they fly.