Lemmings/Tricky Levels 21-25

Level 21: All the 6's...
This level isn't included in Lemmings For Windows.

Level 22: Turn around young lemmings!

 * 5 minutes, 90% of 80 lemmings, release rate 88

Choose a spot, and bomb the first and fourth lemmings as they pass that point. Build a ramp out of the resulting pit, so the turning lemmings can climb out to the exit.

Level 23: From the boundary line

 * 5 minutes, 60% of 80 lemmings, release rate 99

I don't think this level is possible in Lemmings For Windows; no matter how diligently I apply techniques revealed in other walkthroughs, the best I can manage is 46 lemmings home — two short. If you know differently, feel free to edit this section...

Level 24: Tightrope City

 * 2 minutes, 94% of 80 lemmings, release rate 85

As soon as the first lemming lands, make him a blocker. When the lemmings have almost reached the other end of the platform, block the second one from the right, then build to the exit (this will take two builders). Finally, build over the righthand blocker (the ground is too thin for him to be removed by being bombed).

Level 25: Cascade

 * 5 minutes, 13% of 80 lemmings, release rate 99

The best you can do on this level is to save precisely the 10 lemmings you need to save and no more. Turn two of the first lemmings out into floaters, then when all or most lemmings are out, expend your 8 remaining floaters.

The first floater digs a pit in the column at the top of the staircase; the second skips over this pit and builds to the solid column, then bashes through it (while he's doing this, turn the digger into a builder so the pit doesn't get too deep). Finally, have him build from the other side of the column, then build out of the pit.