I just noticed there is an achievement to kill 5 Million monsters inside rifts... I haven't even killed 1 Million in total since release.
There's also an achievement for completing 150,000 bounties. I know having some long-term goals adds longevity to the game, but that is crazy. Someone worked out that doing 10 bounties per hour and playing for 5 hours per day, it'd take over 8 years to complete.
If you can kill 5000 monsters every day inside rifts, it'd take 1000 days to get the 5 Million killed achievement.
There's also an achievement for completing 150,000 bounties. I know having some long-term goals adds longevity to the game, but that is crazy. Someone worked out that doing 10 bounties per hour and playing for 5 hours per day, it'd take over 8 years to complete.
If you can kill 5000 monsters every day inside rifts, it'd take 1000 days to get the 5 Million killed achievement.