*I had External Shaders Enabled in the attached screenshots (though it's just FXAA and Bloom).
*Played in OpenGL Hardware mode, mostly upscaled to 1440p resolution (2560x1440), but at native resolution during bosses.
*Enable the appropriate Interlacing options to avoid bobbing (F5), or leave it at Auto.
*RUNS AT FULL SPEED
Bugs, Issues & Solutions:
*Slows down when two specific bosses are present:
- The fat boss (up to 25% decrease in speed)
- The female flail boss (up to 35% decrease in speed)
but otherwise both are relatively easy to defeat. EDIT: You can mostly avoid this by running in native resolution or Software Mode
*Only minor flickering with ground textures sometimes, usually at a high distance.
*No other major issues, running in OpenGL Software mode pretty much has no apparent issues.
Amount of testing done (little/medium/much/completed-game): Completed-game (Play the 2nd game/Zombie Hunters 2 instead, this one's bad)