There's one in the Battle Missions book - I'd use that to build forces but think up your own missions to go with them.
- Blow up a bunker - Cross a zombie-infested city - Defend a tower - Steal a vehicle - Capture an enemy leader - Stop a prison breakout - Fight a single huge monster - Cross a deathworld jungle teeming with deadly plants and creatures - Fight aboard a moving vehicle - Race or chase an enemy unit or vehicle - Stop a doomsday device - Capture a Catachan Toad without smearing yourself over the landscape
"If you can't be good, be colorful." -- Pete Conrad
"There's only one principle of war and that's this. Hit the other fellow, as quick as you can, and as hard as you can, where it hurts him most, when he ain't lookin'!" -- Bill Slim