Easy achievement that will take time. Even if you play alot of matches against other players, this might take years depending on how much you play each day, if you even play on a bomb objective map. If you really want this achievement, there is a faster process: Create a server yourself, select either Dod_Jagd or Dod_Colmar maps and don't add bots. Dod_Jagd has 3 targets, sherman tank, halftrack and an AA gun. Each target can be placed 2 bombs on. You must play as Axis for this map, as allies are defending only. Once you've blown up the 3 targets, accumulating 6 planted bombs on the objects. I have done the math and come to the conclusion that you will have to do 17 matches in total. 16 for 96 planted, 17th match to finish up the remaining 4 missing plants. (If you already have some planted from previous matches, then getting this achievement will only be unlocked faster.) If you decide to do it on Dod_Colmar map, you can play as either allies or axis, but there are only two targets on each faction side of the map, so that is 4 plants only on each match, which means you'll have to do 25 matches in total on Dod_Colmar to reach 100 plants. You either have to run back for a new charge each time and head back out to one of the targets and do it all over again, or you can stay at the charge, blow yourself up and respawn back, though it will require a few more seconds of your time to run to the charge crate in the ruined church (Dod_Jagd), I've not tested this with Dod_Colmar, but the charge crate is in the middle of the map and is close to one of the either faction targets. I would still though recommend Dod_Jagd over Dod_Colmar. You can also mix them up for a change of scenery. You can also track your progress of this achievement when opening the menu and looking under the "achievements".