To me I feel the achievements list is to small. Currently you cannon obtain all store items with the achievement cape achieved.
With this there are still planning achievements that do not work.and for people like me who cannot okay are damaged near impossible without boosting in which is illegal.
Possible adds:
Kill 50 zammy/bandos/sara/Arma
Kill skitzo [easy task]
Make x amount of a certain potion.
This is general ones. I just hope that yell are able to complete a fix on the achievements. I love this game and these are things that I strive for,end game content.
Also fix herb sacks gem sack. Loot bag. And create a farming crate that holds seeds like osrs.and also put ectophill in achieve store for 50 points to allow access to another farm patch