Full Ms. Pac-Man, plus 12 playable demos including billiards, solitaire, and Bejeweled. Good way to kill a couple hours.
Full Ms Pac-Man game – as far as I can tell, it's a full version.
Alien Sky – six levels, similar to Galaga, slide back and forth, shoot down descending aliens.
Astro Pop – four levels, Breakout without the ball. A wall of colored blocks descends, you pull-down same color blocks, match them, shoot them back into the wall, and destroy same color blocks. Destroy all the blocks before the wall reaches the ground, or until you attain enough points to level up.
Bankshot Billiards – nine different games, timed 2:30 game
Bejeweled – four levels, swap adjacent jewels to match 3 or more in a row or column to clear.
Dangerous Mines – similar to Minesweeper, three different games, each with 3 difficulty levels, timed 5:00 each
Fuzzee Fever – two sets of 5 fields to clear, line up puzzle blocks to clear grid, timed 5:00
Guardian – Defender like, scroll left and right, move up and down to shoot enemy ships and avoid missiles, timed 10:00
Hardwood Solitare III – six different card games including 2 Klondike, Freecell, Golf, Spider, and Golf. There are 5 different "gauntlet" games that consist of 3 solitare games per round. Downside… only one "unique" deal per game (i.e. if you play the same game a second time, the cards are dealt the same way).
Mutant Storm – seven levels, Tempest like, avoid aliens, destroy them to advance.
Ricochet Lost Worlds – similar to Breakout, several levels, kept dying after 2, so couldn't tell you how many.
Super Collapse! 2 – eight levels, match 3 or more blocks to clear.
Zuma – shoot colored balls into growing, advancing chain of balls, match colors to clear, timed 5:00
Where this is for the original xbox, I don't know if it will still work "live" or if it will work with 360. Nevertheless, as a stand alone demo pack, it's good for killing a couple hours here and there.