Super Meat Boy Forever

To unlock you need:
- Get an "S*" rank on all dark worlds
- Collect 90 pacifiers

It is recommended to pass all levels to rank "S" on the first playthrough, since with NG+ the levels become a little more difficult (When you switch to NG+, the conditions that you have made remain fulfilled).
In one playthrough, a maximum of 30 dummies are available, scattered in both light and dark worlds, i.e. you need to beat the game at least 3 times, but to simplify it, it’s better to collect dummies on NG+ only in light worlds and run NG+ all the time until you collect 90 dummies.
My way of going:
- Collect all 30 dummies in the first playthrough and pass all levels to rank "S".
- We start NG+ and collect all the dummies in the light worlds and then start NG+ again until we accumulate 90 dummies.

*To obtain the "S" rank, you need to beat the time of the level and complete it without dying, you can fulfill these conditions separately or combine.