Fusion

DOSGames.com Review:  Rating: 3.5
Fusion is an interesting combination of Columns-style games and Collapse / variants (like Crash Down). Groups of three colored blocks drop from the top of the screen, like in Columns. The goal is to match up groups of colored blocks to clear them. The number required is level + 2; so in level 1, you need 3 of the same color, and on level 3 you need 5 of the same color. This increases the difficulty quickly as the levels progress! You can also create chain reactions, as "the energy created by a fusion reaction lowers the threshold for any blocks remaining", as the documentation explains. A pretty simple concept with textmode graphics but actually quite fun to play.