What are good (free) downloadable games for a laptop on a plane trip?

I'm going on a plane trip and most of the trip on the plane will be about 5 days, what laptop games should I download to past the time by playing?What are good (free) downloadable games for a laptop on a plane trip?checkout addictinggames.com, you'll find plenty of games to download and play. Or try an emulator (NES, SNES, Sega) and download the ROMS for free to play classic console games.