Make sure that you have updated graphics card drivers
Because Amnesia: The Bunker uses OpenGL 4.0, your graphics card may not support the minimum version required or your drivers may be outdated even though you can run most other games (which use Direct3D). In order to learn more visit the Graphics Card Troubleshooting Guide.
Make sure the game is updated
Enable/Disable performance demanding features
Some of the game settings are very demanding for certain computers. Here is a list of the most performance heavy options in the game:
- Dynamic Resolution: Enable this to automatically scale down the image if a scene becomes demanding
- Resolution Scale: Makes the image faster to render but more blurry. But keeps the interface looking crisp
- Framerate and Smooth Framerate: Set the Framerate to 30 and enable Smooth Framerate to make the game more stable on older devices
- Texture Quality: Lower this if you have a graphics card with low memory. Each step halves the memory usage
- Anti-Aliasing: Smoothes out edge in the image. It might make the game run quite slow on older computers and should give a good boost if disabled.
- Reflection: A few levels have full world reflection which can be quite heavy on some cards. Check first and then disable if needed, although world reflection looks very pretty! If removing world refection helps a lot, consider first turning down SSAO settings before turning off world reflection.
- Sun/Shadow Quality: Put this to Low for a large boost in fps, but less smooth shadows. Medium should almost have as good quality as high, so if you want to give a little boost, setting it from high to medium is a good option.
- Lantern Shadows: Enables dynamic shadows from the lantern, which can be expensive is some scenes.
- Skin Shading: Disable for a big boost on older graphics cards.
- SSAO on/off: For older cards, turning off SSAO can increase performance a bit. Make sure to turn up gamma slightly though as having it off makes the screen brighter. Also note that some older cards might freeze if SSAO is on (due to shaders running in software).