Plutonium

necesito jugar a capturar la bandera para completar un desafio en black ops 1, el problema es que no hay servers con ese modo y no quiero hacer unlockall, hay alguna manera de jugar contra bots sin la necesidad de crear un servers? en bo2 se que hay un comando pero en bo1 no me funciona

I need to play ctf to complete a challenge but there are no servers in that game mode, is there a way to play against bots and rank up and complete challenges?

Can I buy the DLC without having the game? Let me explain, I play plutonium but since mw3 dedicated server in the steam tools section, but I don't have the game purchased. If I buy the dlc only, would there be a problem? 86 euros is a lot of money hahaha