_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.