Panos, you are going to get poor. You should gather them into some small groups of achievements and after completing the small group the guy should get his reward.
Ex. roundwinner 3000gold
a) Headshot bagge
b) t-bag bagge
c) tell bagge to get a shield
d) provide a group photo with ivani4
Those don't have to be done in a single round.
After you show all 4 you take the gold.
Imho it would make an achievement more satisfying for players, would save you some gold and stuff.
Also great topic. Forum was getting boring.
EDIT: Do old pictures count? If yes then:
Do they even lift?!?! : Kill 6 or more enemies in the first round without dying, Server has to have more than 30 players
Reward 3000 Gold
EDIT2: Got my reward, ty :*