c4 is described as ', stands for Connect Four, is a browser game written in TypeScript and utilizes HTML's canvas'. There are four games similar to c4 for a variety of platforms, including Windows, iPhone, Linux, Mac and Online / Web-based. The best alternative is SkillGamesBoard, which is free. Other c4 like games are 4st Attack (Free, Open Source), Fial3d (Free, Open Source) and 4 in a Row (Paid).
4st Attack is a game in which you have to try to out-smart your opponent. The goal of the game is to connect four of stones in a straight line. This can be horizontaly, vertically and even diagonnally.
4 in a Row, the classic game that's easy to understand, but hard to master. Your goal is to connect a line of four horizontal, vertical, or diagonal chips before your opponent does. But watch out, it can be trickier than it sounds!