What about Extraneum? It’s cute as a button and very chill with plenty of things to shoot. It feels a bit like a modern wolfenstein since there aren’t any stairs. Gunplay feels nice and the secrets are rewarding. Plus between levels there are funny data discs to read.
back in the dial-up and bbs days, i kept plenty of floppy disks (and later CDs) with my favorite media on them to play when i visited friends. in more recent history i have placed my digital media backups on drives to play at friends’ houses. it’s nice to be offline now and then.
while not technically sneakernet, we did have a piratebox set up at an office that i leased for backing up media collectively.