This is just a maintenance patch to fix some performance issues as well as a bug in the Crunch Time Leaderboards.
- Upgraded to Unreal 4.20.2
- Fixed hitch when towers spawn/despawn.
- Fixed hitch when Garbage Collecting.
- Fixed periodic slowdown in OS Nodes in GRID.
- Fixed Crunch Time scores sometimes being submitted to a non-existent leaderboard.