Can someone please tell me if there is a way to implement a sort of achievement system (or "Milestones" as I would call them) that would unlock after doing certain tasks that would carry over onto different games (like if you died to get a suicide-type milestone).

You could set up a "If" and when player get milestoen object or what ever it is it will move player there.

What should happen, if the player gets an achievement? Just a message? Should this be seen in the game in some way?

Pertex wrote:What should happen, if the player gets an achievement? Just a message? Should this be seen in the game in some way?

Sorry for the late reply, if the player gets an achievement it should show up with an image and text (the name of the achievement and what the player has done to complete it), the only problem I have now is making them carry over onto different games (so I can make some achievements for dying in a certain way and to give the player a better chance of collecting all missable achievements). If I can't do it, though, I might just scrap the idea.

Hmm, if the player finishes a game, you could create a string, where you encrypt the achievements. If the player starts a new game, he can enter this string and you could decrypt it.