Theology and Philosophy:
* "Opera Omnia": His complete works, published posthumously, are a massive collection spanning multiple volumes.
* "De Deo Uno et Trino": A treatise on the nature of God.
* "De Gratia": A work on the doctrine of grace.
* "De Sacramento Eucharistiae": A discussion on the Eucharist.
* "De Angelis": A study on angels.
* "De Purgatorio": A treatise on Purgatory.
* "De Deo et de homine": A work on the relationship between God and humanity.
* "De Anima": A treatise on the soul.
Historical and Biographical Works:
* "De Sancta Maria Magdalena": A biography of Mary Magdalene.
* "De vita et miraculis S. Francisci Xaverii": A biography of Saint Francis Xavier.
* "De Vita et Miraculis Sanctae Ursulae": A biography of Saint Ursula.
* "De Vita et Scriptis S. P. Thomae Aquinatis": A work on the life and writings of Thomas Aquinas.
* "Historiae Societatis Jesu": A history of the Jesuit Order.
Polemical Works:
* "De Jure et Justitia": A work on law and justice.
* "De Imperio": A treatise on political authority.
* "De Magicis et Maleficiis": A work on magic and witchcraft.
* "De Natura et Arte": A work on the relationship between nature and art.
Other Notable Works:
* "De Laude Scientiae": A work praising the value of knowledge.
* "De Virtute et Vicio": A treatise on virtue and vice.
* "De Morte": A work on death.
* "De Vita Aeterna": A work on eternal life.
Gretser's writings were highly influential in his time and are still studied today by scholars of Jesuit history, theology, and philosophy. They offer valuable insights into the intellectual and spiritual world of the early modern period.