I like retro games and I have some links for you.
Stargunner - This is a side-scrolling shoot 'em up game. This free game has awesome graphics and classic gameplay. Are you skilled enough to survive in this game?
Scorched3d - Remember the DOS game Scorched Earth? Well, this one is a full 3D remake of that game.
For more freeware games, open source games, and remakes visit Abandonia Reloaded.