By loader imageObsidian Icons loader image May 28, 2020Obsidian Icons Four in a Row loader image loader image The objective of Four-in-a-row is to build a line of four of your marbles while trying to stop your opponent (human or computer) building a line of his or her own. A line can be horizontal, vertical or diagonal. loader image 0 A.D. Katomic Nibbles KGoldrunner