Sonic the Hedgehog on the Master System is a remake of the Mega Drive game with the same name. While the basic gameplay remains the same (Collect rings, defeat Dr. Robotnik/Eggman, rescue animals), the layout for every single level is completely different, the boss fights are new, the music is different, and there's even a whole new Zone to go through! While the game, overall, isn't as good as the original, it's still quite a faithful remake and definitely worth checking out if you want more Sonic goodness.
Boulder Dash for the Commodore 64 is perhaps the most classic game of the bunch. As Rockford the prospector, your mission is to dig your way through mines, avoiding boulders, fireflies, slime and other nasty things, while collecting a load of diamonds and finding your way to the exit. The game was surprisingly succesful back in the day - It was made into an arcade game (Usually arcade games are turned into home games) and has spawned a whole load of sequels, one of which was actually released not too long ago.
You can't deny Jumpman was influenced by Donkey Kong to some degree - The game's title is an obvious clue, as is the fact that you will find plenty of girders and ladders. The similarity ends there though - There's no giant ape throwing barrels or a damsel in distress. Instead, your job is to run and jump around every level, avoiding enemies and defusing bombs in what is actually a very addicting and fun game. It is considered a cult classic among C64 fans.
Three four-star games - Not a bad load if you ask us. Which do you think is the 250th game?