The Campaign gives a free weapon or upgrade pick on every level-up, like Survival.

Enemies are more aggressive: attacks aim when their tell ends, lunges carry past you, and melee enemies close in while winding up.

Enemies move 10% faster, including their projectiles, and deal 10% more damage.

In co-op, each extra player adds 25% enemy health and 25% more enemies.

The Arc Conductor sounds softer and lower.