No missable achievements (plus 24 unknown)
Sign in with Steam or Xbox to track your progress, and:
You lose at MMO.
Complete Draco's first quest: place five blocks.
Find one reward block.
Become potato for great glory of national party!
Finish all of Draco's quests.
Be mildly annoyed by a dropped connection or a 2AM SERVER REBOOT FUN TIME.
Find five reward blocks.
After getting stabbed by someone with this achievement.
Compulsively collect newspapers from 1995, because you might need them later for reasons.
Join a town.
Write fanfiction that involves a crossover between citizens of your town and an obscure 1960's sci-fi television drama.
Complete a trade with another player.
Pretend to read the credits.
Find fifteen reward blocks.
Be popular and admired.
Write an MMO by yourself for thirteen years.
Spend fifteen minutes in the options screen.
Jeez, calm down. That's enough levels already. Now go outside and really live your life. Visit a new place! Learn a new language! Talk to a stranger! Write a novel! Or don't, I'm just an achievement.
Find thirty reward blocks.
Find EVERY reward block on /rewardblocks (Primary server only!)
Get infected with Zombieism (note, you can't get this from the shop -- you have to be bitten by another player).