Fantahzee: Rogue's Gallery

From the publisher:

The town of Devil's Burden is still under attack, and even more monsters are pouring in! Ingenious goblins, led by the mighty troll king and his retinue, are now laying devious traps all over the town to hamper the stalwart defenders. It is time to call for reinforcements — the long-time secret society within Devil's Burden: the Rogues' Guild.

Fantahzee: Rogue's Gallery adds rogues to the Fantahzee base game. Sneaky, clever, thieving heroes that can help you overcome the Horde. Adding rogues also means adding traps, which require rogues to overcome.

You need the core game to play with this expansion.