A Really Big Bastard is a main story mission in Red Dead Redemption 2 given by Abigail Roberts (Marston), as part of Epilogue - Part 2.
It's the 108° mission in chronological order of the RDR2 story mode, played with protagonist John Marston.
A Really Big Bastard - Mission Details:
Sadie visits John at Beecher's hope. They leave to hunt down a bounty, Marshall Thurwell, in Tall Trees and discuss other men who have evaded their capture.
Mission Objectives
Gold Medal Objectives (100%)
The following are the Mission Objectives required to obtain the Gold Medal in the mission "A Really Big Bastard":
- Shoot the bear 4 times as it charges
- Headshot both the rival bounty hunters in Dead Eye
- Complete within 7 minutes 15 seconds
Note: You must complete all Gold Medal requirements in one single playthrough of the mission.
A Really Big Bastard: Mission Info
- Mission Number 108
- Story Chapter Epilogue - Part 2
- Mission Giver
Abigail Roberts (Marston) - Mission Type Mandatory Mission
- Protagonist (Playable)
John Marston - Location Tall Trees (West Elizabeth)
- Featuring
Marshall Thurwell 
Sadie Adler