Here is the full list of all 81 Lead and Gold - there are Gangs of the Wild West achievements.
Win 100 matches involving sacks of gold.
Win 300 Matches.
Deliver 720 sacks of gold.
Win 30 matches involving sacks of gold.
Deliver 180 sacks of gold.
Win 100 conquest matches.
Conquer 720 zones.
Tag 800 enemies.
Kill 2000 enemies.
Tag 250 enemies.
Trap 720 enemies.
Die 300 times.
Die 150 times.
Trap 180 enemies.
Kill 300 enemies using fanning.
Kill 900 enemies using fanning.
Kill 720 enemies with dynamite.
Win 30 conquest matches.
Conquer 180 zones.
Win 100 powder keg matches.
Destroy 180 Objectives.
Win 100 matches.
Destroy 60 objectives.
Destroy 60 Objectives.
Kill 1000 enemies.
Destroy 20 Objectives.
Deliver 30 sacks of gold.
Kill 180 enemies with dynamite.
Kill 180 enemies with your sidearm (Gunslinger's revolver not included).
Shoot off 250 hats.
Tag 40 enemies.
Tag 20 enemies during a multiplayer round.
During a multiplayer round, gangmates kill 10 enemies tagged by you.
During a multiplayer round, teammates kill 5 enemies tagged by you.
Revive 720 gangmates.
Revive 180 gangmates.
Kill 25 enemies with the coach gun in a multiplayer round.
Perform a Grand Slam (kill 4 players within a short amount of time) in any multiplayer match.
Shoot off 4 enemy hats in a row (without dying or killing them)
Kill 3 enemies within 12 seconds using fanning.
Kill 3 enemies with a single dynamite blast.
Kill a developer.
Collect 8 sacks of gold in a Goldfever (COOP) match.
Killl 30 enemies with dynamite.
Kill 15 enemies with dynamite in a multiplayer round.
Be the player delivering the most sacks to base during a round. Repeat 3 times.
Deliver 4 sacks of gold in a single multiplayer round.
As the Gunslinger, deliver 3 sacks of gold and kill 12 enemies in a multiplayer round.
Revive 30 gangmates.
Revive 12 gangmates in a multiplayer round.
Revive 5 gangmates during a single game round.
Revive a gangmate.
Play all release maps.
Conquer 30 zones.
Kill 250 enemies.
Attain rank 9 in a multiplayer match.
Shoot off 100 hats.
Kill 50 enemies using fanning.
Kill 20 enemies with fanning in a multiplayer round.
Finish off 20 knocked down (KD) enemies in a single multiplayer round.
Finish off 10 knocked down (KD) enemies in a single multiplayer round.
Kill 3 enemies with a six shooter without reloading in a multiplayer match.
Kill one and only one of each archetype in a row (without dying)
Kill 60 enemies with your sidearm (Gunslinger's revolver not included).
Perform 10 headshots with the Buffalo rifle in a single multiplayer round.
Rack up 30 kills in a multiplayer round.
Rack up 20 kills in a multiplayer round.
Shoot off 15 hats in a multiplayer round.
Kill 7 enemies with headshots in a row (without dying)
Shoot off 20 hats.
Perform at least 8 head shots in a single multiplayer round.
Kill 20 enemies with your sidearm (Gunslinger's revolver not included).
Kill 6 enemies caught in traps in a single multiplayer round.
Kill 3 enemies caught in your traps during a multiplayer round.
Win a match.
Trap 30 enemies.
Play a multiplayer round without getting killed or knocked down and kill at least 4 enemies.
Play a multiplayer round without getting killed or knocked down and kill at least 8 enemies.
Catch 10 enemies in your traps during a single multiplayer round.
Score a long range headshot.
Kill an enemy.