In my experience Game companies buy giant font packs (unlimited license) and then use them as needed. You’re right that a lot of fonts are custom made or heavil

In my experience Game companies buy giant font packs (unlimited license) and then use them as needed. You’re right that a lot of fonts are custom made or heavily modified in game, but not all fonts are. A lot of game text is shared between games so they use common fonts. Also the requirement for wide characters like Russian or Chinese make a lot of “toy” fonts unusable.