Talk:Development/@comment-49.147.215.156-20170303073539/@comment-217.10.52.10-20170303094244

Many, as there are some high yield expeditions that you may run in parallel and require drums mandatorily (21, 37, 38) or optionally for great success (24, 40). Add to that some maps with special branching, ... maybe something like 15 to 20 drums. But considering where this question is posted, it is worth mentioning that you don't have to craft them all - there is a quest (F??, scrap 24 equipment...) that grants you a drum every week, so after a few months you should be able to cover most needs.