Version 0.8.6 Brings a few new items and weapons, as well as a new knockback mechanic.
+2 new achievements
+exploding enemies item
+scythe weapon
+knockback item
+reworked knockback mechanic
+mouse cursor auto hides when not in use
Zombie Survivors 0.8.6 New items and Weapons
Source: Steam Community (opens in a new tab)