I was thinking of games like Super Mario Bros 2 which literally started life out as another game or GTA 3.
One of my favorite series from last generation is the High Moon studios transformers games. Unfortunately they aren't making the one that is releasing today. War for Cybertron was a Three Player Co-op game with two different story lines. A Autobot and Deception Campaign that was about 4 to 5 hours each. It had a ton of replay because there was a competitive campaign mode for who could score the most. It also had Multiplayer modes similar to COD but a Horde mode similar to Gears of War. The Horde mode was excellent I played over a hudread hours of it.
The Sequel, Fall Of Cybertron was completely different. It no longer had 3player CO-OP or two campaigns but it fixed a lot of problems. Lack of ammo being number one and some of the game play in War for Cybertron became repetitive because you could start the two campaigns at anytime so they had to have tutorial levels on both campaigns. The campagin still had replay value because you upgrade and unlock new guns for the campaign to beat it on harder difficulties. Multiplayer customization was more fleshed out. The horde mode wasn't as good because it wasn't endless, it stopped at Wave 15. The story didn't feel as strong but there was a good reason. They wanted to give everyone fanservice. The Dinobots don't really fit into the cannon of the video game but the Devs said are really going to complain about playing as a Robot Fire Breathing T-rex. That was a gameplay over story moment.
One of my favorite series from last generation is the High Moon studios transformers games. Unfortunately they aren't making the one that is releasing today. War for Cybertron was a Three Player Co-op game with two different story lines. A Autobot and Deception Campaign that was about 4 to 5 hours each. It had a ton of replay because there was a competitive campaign mode for who could score the most. It also had Multiplayer modes similar to COD but a Horde mode similar to Gears of War. The Horde mode was excellent I played over a hudread hours of it.
The Sequel, Fall Of Cybertron was completely different. It no longer had 3player CO-OP or two campaigns but it fixed a lot of problems. Lack of ammo being number one and some of the game play in War for Cybertron became repetitive because you could start the two campaigns at anytime so they had to have tutorial levels on both campaigns. The campagin still had replay value because you upgrade and unlock new guns for the campaign to beat it on harder difficulties. Multiplayer customization was more fleshed out. The horde mode wasn't as good because it wasn't endless, it stopped at Wave 15. The story didn't feel as strong but there was a good reason. They wanted to give everyone fanservice. The Dinobots don't really fit into the cannon of the video game but the Devs said are really going to complain about playing as a Robot Fire Breathing T-rex. That was a gameplay over story moment.