This update went for adding one of the bigger mechanics: diggable / fillable tiles which allows players to carve out their own underground base entrance (foyer? antechamber?).
The quest and dialog response features now allows for interesting situations. Much like the general bugfixes, there's more to come!
0.50a - FEB 19 2021
=May not be compatible with saves from prior versions
+Added diggable/fillable mars base tile mechanic
+Added resource received effect
+Added saucer base_invader enemy
+Added quest chain mechanic and random event quests
+Added dynamic turret mounts
+Added dynamic dialog, adding / removing resources
+Fixed lighting settings ignoring light cookie (cloud shadows) shader
+Fixed some missing item sounds (many more yet to add)
+Fixed updated unity to 2020.2.3f1 (from 2020.2.1f1)