Your teammates Gas, Soap, Price, Ghost and Alejandro died... You felt very bad, you cried for days at their graves, communicated with the graves and then shot yourself...

you woke up in the cemetery where you committed suicide, but now there were no graves of your comrades there, you ran to the base when you saw them all, they looked safe and unharmed

price noticed you Price : Are you there, son? the rest of the team looked back at you and greeted you