Lesson Learned — Steam game overview

Stored observation / content update: 2026-10-25T22:41:15.000Z

Help Frank travel through history in this unique approach to the tower defense genre. Enter a bizarre daydream world in co-op or solo mode. Gather resources, build defense towers, and manage your minions. Take up the challenge and defeat the incoming enemies!

Game metrics below are stored observations; missing values are unknown.

Revenue is modelled, not confirmed sales. See the methodology and uncertainty range.