Where is the serious bomb?

[NeosForme]

My girlfriend and I just finished playing through the game in co-op ,and though he found quite a few secrets, we never ran across the serious bomb. And strangely enough we can't seem to find anyone else having asked the question online or any just mentioning of where any are. Are we just that blind? xP

[Stryker_A23]

Yeah,i don't know.I saw a video of it,but have never seen it (or anyone who has) in the story mode or vs? However I'm not sure if it is even supposed to be in Vs. Either way,where is it?

[Dooplicity]

The serious bomb is only available in single player.

As for location, most are out in the open IIRC, with a few in slightly out of the way locations like behind buildings.

[alenl]

IIRC, there is an option to enable the Serious Bomb in coop. Use F2 (Custom) on the Difficulty selection screen. Using this will lower your score multiplier, though.