I discovered in the past that the Raspberry Pi OS for arm64 based on Debian Bookworm was not running Unvanquished, while an older Raspberry Pi Os based on an older Debian did.

I first experienced it on a Raspberry Pi 4, I'm now experiencing it on a Raspberry Pi 5.

I now found why it doesn't work.

Fortunately the Debian Bookworm armhf ld loader (that is newer than the one we ship) printed me that error:

./nacl_loader: error while loading shared libraries: ./nacl_loader: ELF load command address/offset not page-aligned

So I could search on the Internet… and a lot of software are affected:

• Pi5 16K PageSize Kernel Incompatible Software raspberrypi/bookworm-feedback#107

Here is the solution:

• Add the line kernel=kernel8.img at the end of the /boot/firmware/config.txt file.
• Reboot!

After the reboot the NativeClient loader will not fail anymore and the game will run.