Here is the full list of all 9 RB: Axolotl achievements.
Welcome to the tank. We hope you have a wonderful time!
Finish ACT 1. Hehe...
Get the only bad ending in RB: Axolotl. Real gaming.
Finish ACT 2.
Everyone can appreciate it!
Finish ACT 3.
Finish ACT 4.
Complete RB: Axolotl.
For some reason the settings page gives an achievement in the new update. This is stupid and makes absolutely no sense.