This isn't as exciting as a new game system and new items, but hey, achievements are neat! I realized that our achievements have a pretty low ceiling (even the Master ones), so I've added support for tier 3 (Grandmaster) and tier 4 (Legendary) achievements.
Once the builds are in the app store(s), I'll start releasing the new achievements bit by bit. For those of you who have already mined a bajillion blocks, well, I guess you'll be Legendary Miners pretty quick ;)
Stay tuned for launch dates!