Yes, there are some FOSS clients for games, but like in FreeDoom and others, they need the original gamefiles to work. Apart, none of the FOSS games have graphics which are up-to date for modern PC, because of this the mencioned The Dark Mod is an excepcion, it’s not a client or front end, but a standalone game, in quality and graphics similar to current commercial games.
Yes, there are some FOSS clients for games, but like in FreeDoom and others, they need the original gamefiles to work. Apart, none of the FOSS games have graphics which are up-to date for modern PC, because of this the mencioned The Dark Mod is an excepcion, it’s not a client or front end, but a standalone game, in quality and graphics similar to current commercial games.