Here is the full list of all 29 Rustler achievements.
The base game contains 28 achievements, and there is 1 DLC pack containing 1 achievements.
Complete the main story line.
Complete 100% of the game, including all quests, side activities, and obtaining every other achievement.
Complete 100% of the game without dying nor getting caught even once.
Kill 500 people.
Catch all horses for This Neigh Land.
Use Pimp-A-Horse 20 times.
Complete all quests for Salazar.
Plow the fields 10 times.
Come first in 10 races.
Gain and then remove a maximum Wanted rating without dying and with no quest active.
Survive for 5 minutes at maximum Wanted rating.
Collect all horseshoes.
Wield all weapons available in the game at least once.
Complete all quests for the Spanish Inquisition.
Collect 20 bodies during the body collecting side activity.
Complete all quests for the Herbalist and the Doctor.
Collect 20000 gold pieces.
Herd a total of 50 NPCs to mass during the church herding side activity.
Kill 5 NPC in 5 seconds.
Win 10 fights in the MMA side activity.
Block 10 attacks in 60 seconds.
Kill an NPC with a cow.
Collect 5000 gold pieces.
Set the amount of blood particles in settings to x5.
Complete all quests for the Knights of the Holy Grail.
Complete all quests for the Priest.
Complete all quests for the Loan Shark.
Complete the first quest.
Successfully complete the Halloween event.