Captain Parker has beef with a gambler named Keith. You can get Keith in trouble by telling Captain Parker that Keith was using these cards to cheat. You still get to keep the cards, and you get a decent amounts of caps as a reward.
The marked cards can be found in the Aerotech Office Park in the Aerotech suite 200 in a desk.
- When dropped, these cards float in air and can even be jumped on, creating a step ladder which the player could exploit.