Talk:Manic/@comment-24915956-20160427222048/@comment-7645613-20160428014120

They have a 100% chance to spawn at the 15th minute mark on all grineer survival missions, solo or otherwise. They may spawn and attack a single player far away, so in a group you may not always fight him yourself.

Other than that, they will appear on most grineer exterminate missions if you let them sound the alarms. If he dosn't appear in like a minute, reset the alarms and repeat. Sometimes they won't spawn at all, but the chance is very high.