1.51.2

Training

• Added a DIFFICULTY option to Training mode. It controls the game's difficulty dip switch, which was previously only available outside of Training.

Fixes

• The game now shows an error message if your GPU or graphics driver isn't supported, instead of just closing.
• Fixed the RenderDoc overlay showing up on Linux systems that have RenderDoc installed.
• Fixed some enemies missing their sprites when starting from the new checkpoints in Training.