No missable achievements (plus 11 unknown)
Sign in with Steam or Xbox to track your progress, and:
You played a Roblox game!
You played 5 different Roblox games.
You changed your avatar's look!
Played 15 different Roblox games.
You played a Roblox game for one hour!
You joined an Xbox party and played Roblox.
You played Roblox 3 days in a row.
You played a Roblox game with 3 of your friends!
You rated 5 Roblox games.
You played Roblox 10 days in a row.
You played Roblox 20 days in a row.