Christianity is a salvation religion because it teaches a message of salvation which is supposed to apply to all of humanity. How salvation is achieved varies: some forms emphasize works, some emphasize faith, and some argue that salvation comes to all, regardless of the actual religion they follow. Whatever the exact circumstances, though, the long-term purpose of life is generally treated as reaching salvation and God.
In traditional Christianity, salvation, revelation, and sacrament are all deeply intertwined. Salvation is communicated via revelation while sacrament provides a visible sign of the promise of salvation. The exact content of each step will differ from one Christian group to another