Achevement suggestions from discord!

-"yeet" all castles? (destroy by ramming)
-steam something?
-speed2? (already one speed achevement in game)
-knights slain in 10 sec? (and other time-based)
-play mv with a friend?
-complete a user-made map?
-air based?
-avoid collisions/fly for x amount of time (no pin/nograv) "falling with style"
-one machine/island challenge (if possible)?
-"peasant space programme" get peasants to y height
-pesont slayer?

These aren't all mine! Feel free to comment yours.

Edit: please also share name ideas for the ones you like.