[RugnirViking]

What video game!? I've seen games that reach up to the already crazy number of 100gb, but I usually just don't install those, with few exceptions

[throw2ih020]

One of the popular flight simulators. Earth terrain data takes up a huge amount of space.

[shmeeed]

I don't know what it is for GP, but in my case it's Flight Simulator 2020 with over 700 GB. Not the standard installation though: it's community mods, mostly photogrammetric data for additional realism. There's a whole ecosystem around the base game that could easily fill several TB if you go all in.