HomeGamesUpdatesPricingMethodology
Steam

Lesson Learned

Also known as Lesson Learned, lesson learned, lesson-learned

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!

Last update
20 May 2026
Players now
0
Original sources
1
Latest update
Security

Ghost Keeper to launch in Early Access later in January.

Greetings! Ghost Keeper is a story-driven single player experience in which you control ghastly and monstrous minions to frighten and remove humans from what rightfully belongs to its demonic citizens. Visit distinct Vi…

4 changesStoreServer
Latest updates

Update history

Browse past updates and patch notes for this game.

20updates

Gallery

In-game media

Achievements

Community progression

Top picks from 24 Steam achievements, sorted by player unlock rates.

  • PrickerBuild your first Pricker.57.3%
  • First lessonComplete the tutorial.52.1%
  • Second lessonSurvive the first wave.45.8%
  • FIrst gradeDefeat your first 10 monsters.44.8%
  • Builder apprenticeBuild your first 10 towers.33.9%
  • Second gradeDefeat your first 50 monsters.32.9%