(there's so many but here's a few)
Go for Balls!
Upside Down Balls
Steel Balls
Pea Balls
Time to Balls up!
Don't Make the Wrong Balls!
The Steel Balls of Kessel
Mind the Balls
(can't remember many from ONML)
Thunder-Lemmings are Balls!
Lemmings for Balls!
LeMming ToMato KetchUp bAllS
There's Madness in the Balls
(and I can remember only two from Holiday)
Get the Balls?
Balls: The Motion Picture
Go for Balls!
Upside Down Balls
Steel Balls
Pea Balls
Time to Balls up!
Don't Make the Wrong Balls!
The Steel Balls of Kessel
Mind the Balls
(can't remember many from ONML)
Thunder-Lemmings are Balls!
Lemmings for Balls!
LeMming ToMato KetchUp bAllS
There's Madness in the Balls
(and I can remember only two from Holiday)
Get the Balls?
Balls: The Motion Picture
Most of the ones I've played/designed tend to fit into one of two styles; "each for themselves" levels where the goal is to guide each lemming/group separately (either towards the same exit or perhaps a few different ones), and "herding cats" levels where the crowds need to be gathered together. Either type of level can feature path crossovers or one group doing something to help another group, or can keep each path entirely separate (or a mix of the two).

