I hope you know Pong wasn't the actual first video game... But if you are talking about the Pong Release - 2011... That's really a tough one. Depends if you want to count PC indie games... Let's just go with 'A lot.'
Well as you should already know, not all original Xbox games are backwards compatible with the Xbox 360. It is usually best to check before they are able to be played before you buy / rent them. You can usually check them at this link. http://en.wikipedia.org/wiki/List_of_Xbox_games_compatible_with_Xbox_360 But you can also check them at xbox.com. But the link I sent you is for a bigger list. I'm also sorry to say that I'm pretty sure that game was probably never backwards compatible. I don't think they take games off when they update, they sometimes add more, but not always. Also if you can't find the game you are curious about on that list, make sure you google it. If you can't find it on google, chances are it probably won't be backwards compatible. I hope I helped in some sort of way for the next time you try to get an original Xbox game.
From what I can tell, not much. But this was posted on their official website about the game.
Enemy Contact. Open fire! Defend the base. Lock down the streets of the local town. Hunt down the enemy in the forests. Rescue the hostages from the caves. Sweep the enemies out of the mountains.
Fly in helicopters. Ride in tanks and trucks. Take it to the ground and get up close and personal with the enemy. Your objective is simple: Grab the biggest gun you can find, then knock out the enemy with your Heavy Fire!
I hope that helped in some way. (Better than just saying I don't know what it's about.)
Well what I usually did... (I usually solo things, and I did solo battles with two monsters many times.) I usually just target one, then take out the other to make it easier. Mark them both (If possible if you run into them.) With paintballs or paint ammo, and just be sure to attack the one you want to attack when it is alone, making it easier for you to kill it without being hit. If you want a tip on weapons, it depends on which monsters you are fighting, so I can't help with that unless you tell me. Good luck on your quest. Oh and on a side note if you didn't know, always bring as much potions as possible if you are unsure. (1 Ancient potion, 2 max potions, 10 mega potions, 10 normal potions + 10 honey to make mega potions.)
Assuming you are on PS3 (Xbox 360 will be in parenthesis)... You press Start, (Start) then go to options and press X, (A) Then it starts out on Config, then press X again, (A) then change Targeting Mode with Left or Right to Casual for target locking, Normal for Partial target locking, and Expert for absolutely no targeting help.