Arcade Paradise
54 Achievements
40-50h
GOG
Once upon a slime
Unlock endless mode in Slime Pipes
0.4%
How to unlock the Once upon a slime achievement in Arcade Paradise - Definitive Guide
There’s a great video guide on YouTube.
All credit to Tiny Solider Games
All credit to Tiny Solider Games
After completing level 24 in Slime Pipes, you will unlock Endless Mode.