The problem is that there are so many contradictory layers to Catholicism.
But I have to say that according to the “Catechism of the Catholic Church” Roman Catholics believe that we are saved, “justified”, entirely by grace, and we ourselves add nothing to our salvation.
Based on the below, I would have to say that the Roman Catholic Catechism does indeed teach that our works not only add too, but are required for, our salvation.
2010, "...Moved by the Holy Spirit and by charity, we can then merit for ourselves and for others the graces needed for our sanctification, for the increase of grace and charity, and for the attainment of eternal life."2027, "Moved by the Holy Spirit, we can merit for ourselves and for others all the graces needed to attain eternal life, as well as necessary temporal goods."
2068, "The Council of Trent teaches that the Ten Commandments are obligatory for Christians and that the justified man is still bound to keep them;28 the Second Vatican Council confirms: "The bishops, successors of the apostles, receive from the Lord . . . the mission of teaching all peoples, and of preaching the Gospel to every creature, so that all men may attain salvation through faith, Baptism and the observance of the Commandments.
2010, "...Moved by the Holy Spirit and by charity, we can then merit for ourselves and for others the graces needed for our sanctification, for the increase of grace and charity, and for the attainment of eternal life."
Note it is "sanctification" addressed here.
As to 2027 that again addresses other aspects of salvation.
And 2068,
The assertion is "salvation through faith".
Baptism: a vehicle for receiving God's grace. Not a "work" per se.
As to keeping the Commandments, Calvin Himself never taught "anomy". But I think this is a point of great complexity and again I don't think Rome is confusing keeping the Law and justification here.
As far as all this goes, I think the most fruitful line is to look at the idea that a "clergy" (the Roman priesthood in apostolic succession) has the only means of dispensing God's grace through the sacraments ministered by the Church.
And once that line is followed, we can see how that even though Protestant and Roman Catholic doctrine and Bible reading is largely parallel, they really operate on very contrary premises. For example the question at hand here: Salvation by God's grace alone. Protestants and Roman Catholics both agree absolutely that it is by God's grace alone, nothing added, that we are saved through faith. The parting of the ways beings with how we receive that grace.
None of this is to suggest that Roman Catholic teachings don't fall into what Protestants believe to be grievous error however. (Nor has the veneration of the "saints" even been broached - how that is "justified" is another fruitful line of seeing the differences between P & RC)
I've bolded the parts you left out:
2010 Since the initiative belongs to God in the order of grace, no one can merit the initial grace of forgiveness and justification, at the beginning of conversion. Moved by the Holy Spirit and by charity, we can then merit for ourselves and for others the graces needed for our sanctification, for the increase of grace and charity, and for the attainment of eternal life. Even temporal goods like health and friendship can be merited in accordance with God's wisdom. These graces and goods are the object of Christian prayer. Prayer attends to the grace we need for meritorious actions.
Next, here's what you left out of 2027:
2027 No one can merit the initial grace which is at the origin of conversion. Moved by the Holy Spirit, we can merit for ourselves and for others all the graces needed to attain eternal life, as well as necessary temporal goods.
If you could post all of of 2068 in context, why not all of 2010 and 2027?