Board Thread:General Discussion/@comment-202.150.1.24-20130831153056/@comment-3153244-20130923004417

It's not confirmed that DDTs appear in groups, although they usually do so.

For me, the hardest thing about DDT tiles is the early-game. They send powerful bloons at you early on, so you might even die before you see a DDT. It all depends on the map of course. Spactories seem to be a great way to take out DDTs.