I would personally love achievements, but as Charr mentioned we need a tracking system. This has been thought of before and Thomy has clearly said that if he ever creates something like this, it will be a general tracking system, which could be used for countless of things. There's no point creating separate system for only one feature.
The last time I mentioned this, I used Achievement diary reference, but this was rejected fairly quickly (one time content; emps doesn't have such random things to do). This kind of applies to this as well. Of course we could make the monster-slaying achievements repeatable, however this could mess up the rewards, atleast the ones I have in mind.
Here's what I think of your rewards:- Definitely no. I'm personally not concerned with the flow of items, since this isn't something that encourages people to achieve such goals. The items from the monster's droptable shouldn't be used.
- I'm against this as well. Double XP is now solely exclusive to EC shop. It's one of the most popular items from that, since it's the fastest way to get cash from there (also the most efficient in term of gains). Any alternative sources, will lower the demand.
- This is a step in the right direction, however generally achievements can only be earned once, so it's hard to collect all the items if the boxes/items are even tradable. Also, if they would be tradable and the achievement can be earned once, this kind of encourages having multiple accounts (certain achievement farming), which is not something I'd want.
- Not a bad choice, however the rewards in EP shop aren't that wanted, so many people would find this reward underwhelming.
My suggestions:
- Instead of an item from the monster's droptable and/or a new mystery box, there's a certain unique drop (1 item per boss/monster, 100% drop chance upon completion). This could be pretty much anything: a cosmetic item, pet etc.
- Titles: this would probably be the best solution to this. I've been against it before, but it suits this perfectly.
- We could also make them give out Achievement points (from here on AP), which could be used at AP shop. The shop would have various cosmetics etc (some items could have AP + achievement requirement; for example General Graardor pet (miniature version) should have kill Graardor X times achievement requirement). This could make the repeatable pvm achievements a thing.
These PvM achievements and unique rewards would promote mass pvming though, which increases the item flow. Considering our current market, this might not be a good thing.
Saif Nawaf, getting clue scrolls a drop has nothing to do with achievements. They're way too common and easy to get to be to be considered as such. I see them as alternative gameplay - it's basically a mini-game, if you think about it.