Assault Battles are a special type of event that require you to play through 8 waves of enemies. Each Assault Battle features a different faction of enemies and requires you to use a different faction of characters to defeat it. Assault Battles have multiple tiers: Tier I (Hard), Tier II (Very Hard), and Bonus Tier. Each tier is a harder version of the previous one with identical enemies that have higher levels, gear levels, health and damage. Some Assault Battles have a fourth tier known as the Mythic Tier. Mythic Tier will be significantly harder than previous tiers and may have different enemy compositions for waves. Assault Battles with a Mythic Tier may also have a fifth and sixth tier known as Challenge Tiers I and II. (Add brief info on Challenge Tiers here).
- Victory counts are not shared between the tiers and Tier I and Tier II are able to be refreshed. Assault Battles events run for 24 hours.
- Each Assault Battle has a special ability that characters can use, this ability sometimes changes dependent on the character's faction.