Though there aren't any actual playable PSP games here at E3, Sony is showing off plenty of game demos at its booth, including Konami's new Metal Gear game, Metal Gear Acid. While the demo isn't very long at all, it does reveal a few tidbits about its gameplay.

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　　The largest revelation to come out of this demo is that Metal Gear Acid isn't an action adventure game like its predecessors. Instead, the game is a turn-based tactical strategy game, with what appears to be some card-battle-like mechanics mixed in. You'll move Snake a certain number of squares around a map as you try to sneak up behind guards and take them out.

　　The cards are, essentially, your weapons. We saw cards for most of the standard Metal Gear weapons, including silenced rifles, claymores, and the like. The turn-based game also gives you some other options, such as the ability to crouch out of sight, knock on walls, and so on. When your turn ends, the screen moves around to the enemy soldiers on the map, giving them each a turn to act. Actions like moving and putting certain weapons into play have a cost associated with them, limiting the number of actions you can take during one turn.

　　Graphically, Metal Gear Acid looks pretty sharp for a portable game. The demo gets up close and personal with the models for Snake and the genome soldiers he attempts to eliminate, and the models look good, even at close range. The demo is slightly interactive, but it only lets you control the camera during the action instead of letting you control any of the happenings in the game.

　　Metal Gear Acid seems to be an interesting change of pace for the series, and it will certainly be interesting to see how this game comes together over time.