Ok, lets setup my background. Totally linux indoctrinated, commercial enterprise support etc. However, I’m new to Bazzite and indeed to BTRFS and read-only distros.
I took the default in installation and gave it a 500 GB ssd. My home however is only 5 GB, and I’m not quite sure what the expectation of installing GOG games is (where?)
Should I have manually made space? It subsumed all space into a volume that apparently contains var and home, but doesn’t appear to be available anywhere to actually use when installing a game requiring 130 GB.
I could do things, but I thought I would try to see what the ‘normal’ way of doing things would be, since my way would be the hammer.
I would have gotten onto discord to ask, but hey, it decided my discord account was in use somewhere else and wouldn’t allow me in.
Good day so far 
To be clear, you installed Bazzite on it’s own ssd?
If that’s the case you should have drive setup similar to this.
nvme0n1 259:0 0 1.8T 0 disk
├─nvme0n1p1 259:1 0 600M 0 part /boot/efi
├─nvme0n1p2 259:2 0 1G 0 part /boot
└─nvme0n1p3 259:3 0 1.8T 0 part
└─luks-bbb3565d-241d-415c-b45f-5a41bdcbc075 253:0 0 1.8T 0 crypt /usr/lib/waydroid
/usr/bin/gamescope
/var/home
/var
/sysroot/ostree/deploy/default/var
/usr
/etc
/
/sysroot
So your games would go into the /var/home/user directory, which if using default install in your case should be hundreds of gigs of free space.
Odd, here’s what I got:
sdb 8:16 0 465.8G 0 disk
├─sdb1 8:17 0 600M 0 part /boot/efi
├─sdb2 8:18 0 1G 0 part /boot
├─sdb3 8:19 0 431G 0 part
└─sdb4 8:20 0 32.5G 0 part /usr/lib/waydroid
/usr/bin/gamescope
/usr/libexec/ksysguard/ksgrd_network_helper
/var/home
/var
/sysroot/ostree/deploy/default/var
/usr
/etc
/
/sysroot
When I mounted and listed /dev/sdb3 (which appears to be where the most space is), it shows me subvols for @ and @home.
DF:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sdb4 34086912 21050080 12154448 64% /sysroot
devtmpfs 4096 0 4096 0% /dev
tmpfs 15971204 85704 15885500 1% /dev/shm
efivarfs 128 26 98 21% /sys/firmware/efi/efivars
tmpfs 6388484 10484 6378000 1% /run
tmpfs 15971204 5708 15965496 1% /tmp
/dev/sdb4 34086912 21050080 12154448 64% /var
/dev/sdb4 34086912 21050080 12154448 64% /var/home
/dev/sdb2 996780 312084 615884 34% /boot
/dev/sdb1 613160 12700 600460 3% /boot/efi
tmpfs 3194240 184 3194056 1% /run/user/1000
Am I misinterpretting something?
Your /var/home is on sdb4 which is 32.5 gigs. So there is no room for games.
Did you do custom partitioning on install?
Also is sdb3 just unused space on your drive?
It sure appears to be (to my untrained btrfs eye) totally unused, though it SEEMS to contain @var and @home. Let me actually mount it up and descend those trees…will edit here.
No, I let the recommended/automatic scheme loose.
It appears that sdb3 does indeed contain @home and @var.
I assume something went horribly wrong in the setting up of partitions?
Should I just roll the dice and start over? I’ve done nothing inside the setup that it would pain me greatly to lose.
It looks like sdb3 is unused space on your drive.
When installing did you choose to erase drive and install?
Yeah maybe just doing fresh install would do. But I would make sure all partitions are erased and the whole drive is given to Bazzite.
Yes, I erased existing partitions and turned it over to the installer as the whole drive.
I’ll try again 
and hope for better luck.
Yep, that did the trick, things look normal/understandable now. I wonder?
Now off to explore the immutable trails. Thank you.
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