Talk:Wyrm Prime/@comment-68.231.75.19-20160114180713/@comment-121.217.96.217-20160404120743

Yep, definitely does drop in T2Ext (screenshot of mission summary).

Just in case you don't believe me, the credit reward is what you get in T2 (13900 with no boosters), and the wiki has the cerebrum listed in T1Ext and T3Def (both of which would give less, or more credits, respectively).