As for online games because you did get specific. Pokemon (is online), borderland, castlev HD, black ops 2 (it had been two years after all dlcs), super smash bro (wii), black ops one (name the last dlc, it's been far over two years). Hell pong is online now and is still played by people, even checkers chess ect are online games though feel we should exclude board games. Champions was a pretty fun online game, and it did not use dlc (basically like a wow game yet it was on ps2) the list still goes on even if I use online, some of these games like smash bro still have tournaments and never get old. Some have used dlc, yet it's been well over two years sense that dlc was released and people still play it. If the game is good it will surpass the ages without more content added, this is why I pointed out the nes games in my first post (which for some illogical reason you exclude for not being online, yet not being online would actually hinder it even more. But it barley mattered because I can name many many games lol.) Dreamcast online games lasted for....a very very long time fwi.