The reason they often aren ' t included is because they are different games from a different time . They share setting and lore , but in terms of actual gameplay , isometric , turnbased RPGs are incredibly different than Realtime shooters . They play incredibly differently , and overall , while great games , aren ' t typically relevant to the modern era of Fallout . In terms of RPG potential and story they outshine the new ones Vegas very much included but in terms of games , to play , they aren ' t terribly fulfilling to a vast swathe of current gamers . That still doesn ' t mean you can ' t judge the modern games by the older games . You can judge them according to the roleplaying potential , character design , ect . Just because they have a few superficial differences in gameplay doesn ' t mean they are in an entirely different league , and it certainly doesn ' t mean they should apply to different standards .