This iceberg attempts to show the scale of difficulty getting an achievement can be, measured only by skill. We will not measure the following: -PvP achievements -Luck or time (not to be confused with timing) based achievements, unless endurance is involved. -Impossible achievements. There has to be proof something is humanly possible for it to be added, but it doesn't have to be done by someone to confirm it. -Achievements with requirements that keep updating over time. Only add them if such requirements are confirmed to be final. Other than that, anything goes, and some exceptions may apply, but rules can be updated as time passes to ensure that skill can be measured.