Helldivers 2 devs slash install size from 154GB to 23GB, thanks to the help of PC port veterans — ditching HDD optimization, 85% size reduction accomplished by de-duplicating game data

https://www.tomshardware.com/video-games/pc-gaming/helldivers-2-install-size-slashed-from-154gb-to-just-23gb-85-percent-reduction-accomplished-by-de-duplicating-game-data-an-optimization-for-older-mechanical-hard-drives