Mouse Controlled Shooters
In platform games, it's standard fare to jump over or on top of your enemies. Occasionally you are granted a weapon with the rather limited range of directly in front of you. Fortunately, every now and then, an often overlooked method of weaponry is employed: control the hero with your left hand on the keys, while simultaneously aiming anywhere on screen with the mouse, providing 360° of free-firing joyous joy.
Abuse / fRaBs (Mac/Win/Linux, 200kb - 3.5MB, free) - Originally released in 1996 as a commercial title, Abuse was a dark game which centered on a hero who delved into dark passageways and dingy corridors to wantonly blow away hordes of mutants. A few years after its initial release, it became public domain and has been ported to several different platforms since. The project fRaBs (Free Abuse) was started to give a fresh approach to the game with whole new levels, plus additional user created levels.
TAGAP (Windows, 97MB, free) - Previously reviewed here upon its initial release, The Apocalyptic Game About Penguins is still one of, if not the most action packed, explosion filled, penguin-centric game with flamethrowers and machine-gun hover tanks to be seen in the freeware market. Throughout the game, you'll traverse throughout different terrain, wielding a host of dual-use weapons while blowing away rampaging zombie penguins. It's a hefty download, but worth it if you missed it the first time.
Easter Avenger (Windows, 5.9MB, free) - In this Easter-themed game, you play not as a jolly rabbit, but as an Easter egg who is sporting a major attitude, disembodied arms and a host of weapons (including a shotgun and baseball bat). Hop through the levels while placidly shattering any fellow eggs who happen to get in your way. Although control can sometimes be an issue, its not often you get to play as an egg in any situation, let alone one with violent intentions.