Abyss Mode

Abyss Mode is a local single-player or co-op mode in Rivals of Aether. The objective is for players to go through set waves with challenges that get progressively harder the further the player gets in Abyss Endless, or use Abyss Runes, enhancements to the characters, in a multiplayer battle similar to Versus Mode in Abyss Versus. The player can then purchase Abyss Runes with the Aether Coins they receive from playing the game in any mode, which give enhancements to characters that can be used in Abyss Mode.

Endless
Endless Mode is a local single-player or co-op mode where players go through set waves with challenges that get progressively harder the further the player gets. The only available stage is The Endless Abyss. There are 15 waves in Endless Mode.

Versus
Versus Mode is a local multiplayer mode. It is nearly identical to Versus Mode, except players are allowed to use Abyss Runes, enhancements to the characters in battle.