Sniper

If you acquire a Gun in a non-traditional way, like from an Equipment card, you immediately aim it at a player of your choosing.

In 1st-3rd Edition, the answer is no. If all Guns are taken, you may not take the Arm action. In the 4th Edition of the base game, a Gun for each player was included, so there would be no way for you to run out of Guns.

Yes. Table talk is encouraged. You can SAY anything youw ant (or nothing) about the cards you have seen, although the things you say could be true or false. You may never SHOW someone one of your hidden cards though.

No. Once the game has begun, you Integrity cards must remain in the same position throughout the game.

No. If you already have a Gun or Arms (Zombies expansion), nothing may be used that would give you another one.

If you are playing by Undercover 1st Edition rules, the red side that says 'Active' in the upper-right corner can be used on your turn instead of your normal turn action. The purple side that has 'Passive' in the upper-right corner is always in effect. If you are playing with Undercover 2nd Edition rules, there is no longer an Active side. Every Cover ability is always in effect.

If a card says you can choose 'a player' or 'any player' or 'one player' or 'two players', you may choose yourself. If it says you can choose 'another player' or 'other players', you may NOT choose yourself.