There are 3 guys after the RPG. After killing them and moving up, only then do the two others show up. Be quick.
no done it just as shown in the many vids, gone in the bus shot at by the rpg then killed the 2 guys in front, moved on building falls no achievment???
You must be doing something wrong.
is anyone not unlocking this achievment, don in 3 times now and it still aint giving me it!!