Donkey Kong, Scramble, PacMan and more!
This site has a bunch of small portable arcade games: http://mysite.wanadoo-members.co.uk/freeware01/gamemaker.htm
I tested out Donkey Kong, Scramble, Burger Time and Space Invaders but there are much more to choose from such as 2 PacMan clones, Nibbles and other Commodore 64 remakes. The games I tested are all pretty small at around 3 MB or less. The Burger Time had neat graphics but was a bit frustrating at first – you have to be exactly aligned to move on and around the ladders and it’s hard to tell at first until you get the hang of it. Scramble was fun and quite challenging; Donkey Kong was great!
There are 18 free arcade games to try out; should be enough to keep you busy over the weekend.