Alge-Blaster 3 is the third game in the Alge-Blaster series following Alge-Blaster Plus! from 1989. This version has an overarching theme of protecting a planet from aliens and consists of four different activities:
Challenger is a combination of the learn and practice activities from previous games. It consists of four components: a video chalkboard that explains a problem visually, a text version of the same problem, a practice area and a word problems area that shows how to translate words into math facts.
Decoder is based on the translate activity from Alge-Blaster Plus but here each correct answer reveals a picture that is part of a rebus. Once all pictures are uncovered the player has to figure out the right mathematical word and select it from a list.
Simulator is based on the graph and game activities from Alge-Blaster Plus. When choosing the point variant the player has to click on aliens on a grid that corresponds to the right coordinates. In the slopes variant the player has to use slope information to fire lasers at aliens.
Red Alert is similar to Missile Command with the player having to protect cities on a planet surface by shooting at aliens that appear from the top.