Disclaimer: I'm not a game dev. The technical problem is probably the smaller issue. The larger issue is that the publishers of the respective games have to al

Disclaimer: I'm not a game dev. The technical problem is probably the smaller issue. The larger issue is that the publishers of the respective games have to allow this type of cross-usage, and they do not have an incentive to make their games interoperable with other games. Even in business software, where there are practical incentives to interop, compatibility at the level of asset sharing remains very rare.