St. Croix Pan is an AGS game that's an interesting combination of a graphic adventure and a fixed-position shooter. It's quite short, but in its short duration manages to impart something of the bleakness and danger of war, via retro pixellated graphics that nonetheless suggest the ruins of a small town in Normandy, and a somber musical score that avoids becoming annoying.
You are an airborne infantryman, separated from others of your unit who may have died in the drop. Your mission is to hold a crossroads at a small town in Normandy, to prevent the Germans from reinforcing the beachhead. There's a church tower at the center of the town that provides excellent sight lines, and the first part of the game is a puzzle-based adventure game in which you figure out how to enter the tower and position yourself to monitor the road.
The main portion of the game is a fixed-position shooter, in which you look through your sniperscope, seeing only a small portion of the view at a time. A squad of German soldiers approaches, and with limited ammo, you must kill them. Interestingly, your viewfinder shakes a bit as you breathe, and you aim best for a second or two during the breath cycle, holding your breath for a moment after inhaling. This reinforces the feeling that you are, in fact, a sniper.
The game autosaves at critical moments, which is useful, as it's quite easy to get killed. The endgame, if you survive, is a brief action sequence coupled with a bit more adventuring.
On the whole, it's a nice, tight little game with an unusual combination of elements.