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 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.
Catch all horses for This Neigh Land.
Collect all horseshoes.
Plow the fields 10 times.
Complete the main story line.
Wield all weapons available in the game at least once.
Come first in 10 races.
Complete all quests for the Spanish Inquisition.
Kill 500 people.
Block 10 attacks in 60 seconds.
Gain and then remove a maximum Wanted rating without dying and with no quest active.
Use Pimp-A-Horse 20 times.
Survive for 5 minutes at maximum Wanted rating.
Herd a total of 50 NPCs to mass during the church herding side activity.
Complete all quests for Salazar.
Complete all quests for the Herbalist and the Doctor.
Collect 20000 gold pieces.
Collect 5000 gold pieces.
Kill an NPC with a cow.
Set the amount of blood particles in settings to x5.
Win 10 fights in the MMA side activity.
Collect 20 bodies during the body collecting side activity.
Complete all quests for the Priest.
Complete all quests for the Knights of the Holy Grail.
Kill 5 NPC in 5 seconds.
Complete all quests for the Loan Shark.
Complete the first quest.
Successfully complete the Halloween event.