Call of Juarez: Bound in Blood
48 Achievements
20-25h
PS3
Act II
Complete Act II.
38.8%
How to unlock the Act II achievement in Call of Juarez: Bound in Blood - Definitive Guide
Basically you cant miss the achievement because it's story related. You just need to complete the Chapters IV, V and VI.
This is a story related achievement, keep playing to unlock.