Castle Shikigami 2
Highly Underrated Game
If you're looking for a cheap "maniac shooter" shoot 'em up, look no further than this game. For those of you that don't know, this game has one of the worst translations ever; however, the poor translation results in hilarious dialogue. Probably the best $4 i've spent on a game in awhile. If you're curious, the first game in the series is the ps2 title "Mobile Light Force 2" and it's a good shoot 'em up with a few characters from this game but it doesn't have any dialogue. Once you're done with this game, if you have a wii you can get Castle Shikigami 3. I'd argue the gameplay in 3 is slightly better than 2's, but the dialogue in 2 takes the cake.
Fun but Intenese
Gameplay: You can play as one of seven characters through this vertical scrolling game. The action is fast-paced as sometimes several dozen bullets will be speeding towards you creating a nearly impenetrable barricade. Luckily your character only needs to dodge bullets from hitting the white little dot on his/her character.
The game is interesting in that it rewards you for killing enemies while skating along bullets just managing to avoid taking damage. The game seems to delight in forcing you to skirt around these bullets as well if you want to perform a more powerful version of your basic attack. The game rewards risk, so the question becomes how daring are you.
Sound: The soundtrack is rather enjoyable. The game definitely has an arcade feel to it. This is probably helped along by the fact that your extra lives are referred to as credits.
Graphics: The game is rather pleasant to look at. While it isn't as visually impressive as Final Fantasy XII the game more than delivers and doesn't suffer from lag when tons of stuff is happening on the screen at once.
Lasting Appeal: The game offers multiple modes such as arcade, boss attack, and practice mode to hone your skills. And, I'd argue that you need to hone your skills since this game will readily kick your butt if you don't.