i've got a couple
The Freekill
one ct rushes from the armory and kills all T's before they have a chance to leave their cell, winning the round
The Nazi
one ct (usually frustrated with losing) begins the round by giving extremely strict, and unforgiving rules, (crouch to said area, and shooting any who dont listen) as a way to thin out the herd, the ct will then force the T's to said area, where he will then leave them there to rot, while he runs and gets an AWP, and returns to camp the main exit.
The Bubbles:
When bubbles starts in a cell away from the gun cell, and quickly cell hops upon release to gain a weapon (usually usp) Bubbles then finds a cell with a likable view, and hides in it as the Ct's close him in, at this point (with a silencer if available) bubbles waits until the CT's are preoccupied with giving orders, and begins to shoot CT's closest to the T's, taking very careful aim.