Sueño wants to meet up in Monte Puncu. Also there ARE two endings to the game with El Sueño, but I clearly don’t realise at this point how that works – this video is NOT both endings. My mistake.
But it IS two missions. The first “El Sueño’s Proposition” is very quick, so we have time to also tackle the final mission, simply, “El Sueño”. I won’t spoil it for you… watch and enjoy.
Also, the ¡SILENCIO! gun is unlocked, which I must remember to try out.