Perfect Dark Zero

For this Achievement I just used a second controller and played it on the Urban Map, with the round limit set to 3 and the time limit set to 5. You should also set the amount of CR you start out to at least 10,000. That will give you enough to buy the Superdragon ( which was all I really needed ).

I would simply hunt down the other "player" when I was defending and kill them. The path I used to destroy the items was as follows... 3 grenade rounds for the items in the "shrine gardens", 6 grenade rounds in the "red light district", 1 demo kit on "factory st.", 3 demo kits in "shipping co.", and then 1 more grenade at the top of the "car park/flyover".
the achievement should unlock after 1 match, repeat this two more times to get the 100,000 CR one. Oh and don't forget to move the second controller at the beginning of each round. I forgot once and it ended the match early.

This Achievement is awarded for destroying property during DarkOps: Sabotage matches. After destroying 10,000 credits worth across all your Sabotage matches, the Achievement will unlock.

Like most multiplayer Achievements, this can be obtained by setting up a match against another player using a second controller. Simply play one-on-one matches and leave the other controller idle. You will need to move the idle character once to keep the game active. Smash all of your opponent's property in one round and you will break the 10,000 mark.