G'day, rat racers!
The game is now out! Thank you for trying it out and have fun!
Now, for issues I'm aware of that could make it difficult to run and/or may impact gameplay. Some of these I will attempt to address in a future patch; stay tuned!
Dualsense haptics on Linux systems sometimes don't behave the same as on Windows.
Using a Gamepad via Bluetooth with Rumble enabled may cause the game to hang if other non-Gamepad devices are connected. If this occurs, it is recommended to disconnect any other bluetooth input devices while using your wireless controller if you want to use rumble.
Using a wireless DualShock/DualSense gamepad on macOS with Rumble enabled causes the game to hitch every time haptic feedback plays.
Sometimes boosting has slightly erratic haptics on a Dualsense controller on some Windows setups.
Mouse navigation in the pause and results screens doesn't work.
Controller LEDs on DualShock/DualSense gamepads turn off after race completion.
Attempting to use the Wayland launch option on some KDE Plasma setups on Linux may result in the game instantly closing without any error message.
If your graphics card doesn't support Vulkan 1.0, enabling "Reduce Buffering" and "Use Vsync" at the same time may result in the game dropping to a low framerate on the first spike in GPU utilisation; workaround by disabling vsync, reduce buffering or lowering the graphics settings.
Integrated Graphics Cards mistakenly have realtime reflections enabled on first launch; disable them in the options menu if performance is subpar.
Input latency with some graphics cards and display combinations on Windows with Vsync enabled is excessively high.
Frame times can be erratic on Vulkan drivers using GDI+ to implement the Vulkan swapchain; set FPS cap to unrestricted or turn on vsync for a workaround. WARNING: Running unrestricted framerate may cause your PC to overheat - please assess your PC's cooling system's ability to cool your CPU and graphics card under load before setting your framerate to unrestricted.
AMD graphics cards on Windows with Radeon Software version 22.6.1 or older when running with Vulkan may freeze and crash to desktop after enabling 4x MSAA. If your AMD graphics card has the GCN4 microarchitecture (also known as Polaris/Vega) or newer, please upgrade your drivers instead!
The game may hang on NVIDIA graphics cards if the Vulkan/OpenGL present method is set to Auto and the game's FPS cap is set to unrestricted. If this happens, change the setting for the game via the NVIDIA App/Control Panel to "Prefer native" instead of "Prefer Layered on DXGI Swapchain"
A rainbow flash behind the UI will appear if the race replay is still recording and you attempt to navigate to either "view replay" or "save replay" while both buttons are greyed out.
The race position at the start of a race is incorrect until every Rat has passed the start line.
The camera rotation when changing POV in replays is incorrect for a single frame and/or spins around instead of changing seamlessly.
The displayed race position in cases where players have already crossed the finish line will show up incorrectly. This is a purely cosmetic bug and doesn't affect the finishing position.
The performance ratio visible in the player profile may sometimes fluctuate way too erratically if the player fails to beat the estimated race time too many times.
Missiles if shot from 1st place will target the last place player.
Race courses on Beach sometimes have self-intersecting geometry errors in the generated cliffs that can trap players.
Performance on Volcanic race courses may be lower than expected.
One more thing I'd like to clarify in the game settings themselves is the "Reduce Buffering" option. This is also explained in the game manual, provided in PDF format and available at first launch or from the options menu. What this does is reduce the number of frames simulated ahead to 1 to reduce display latency, at the cost of performance on CPU bound setups.