Take Aim is a 2D arcade shooter prototype originally created by Adam Saltsman in mid-2008, but was abandoned and remained unknown to the public until now. Here you play as a sniper who has to take down all kidnappers in every level with just your rifle and the attached scope. Players have to keep the target in their sights and fire at the right moment, since every time your heart beats the rifle will move around just a tiny bit and interfere with your concentration.

Take Aim was one of the five unfinished prototypes released by Adam yesterday. All of them are in various incomplete states but are available to try out online. (source)