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