The Tides of the Foscari Add-on for Vampire Survivors has 22 achievements.
Defeat a total of 6000 Rotting Ghouls.
Defeat a total of 6000 Sammies.
Survive 15 minutes with Genevieve Gruyère.
Evolve the Shadow Servant.
Survive 15 minutes with Luminaire Foscari.
Evolve the Prismatic Missile.
With Eleanor, break the Seal of the Banished.
With Maruto, break the Seal of the Abyss.
Survive 15 minutes with Keitha Muort.
Evolve the Flash Arrow.
With Keitha, break the Seal of the Lake.
Evolve the Eskizzibur.
Find the Lake Foscari Map.
Survive 15 minutes with Maruto Cuts.
Survive 15 minutes with Eleanor Uziron.
Get SpellStream to Level 6.
Get SpellStrike to Level 6.
Unite SpellString, SpellStream, and SpellStrike.
Find and open the coffin in Lake Foscari.
Defeat the Avatar of Gaea in Lake Foscari.