Critical Mass is an educational video game being developed at Purdue University

Purdue University

Purdue University, located in West Lafayette, Indiana, U.S., is the flagship university of the six-campus Purdue University system. Purdue was founded on May 6, 1869, as a land-grant university when the Indiana General Assembly, taking advantage of the Morrill Act, accepted a donation of land and...

. The game teaches players about chemistry

Chemistry

Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds....

 while they try to save the world. The game uses the Truevision3D

Truevision3d

Truevision3D is a 3D commercial 3D engine first created by Sylvain Dupont in 1999.The Truevision3D engine is written in Visual Basic 6 and C++ and layered on top of the Microsoft DirectX API, currently supporting DirectX version 8. The engine is accessible from a number of programming languages...

engine.

This game has come under scrutiny as the creators may be facing a copyright infringement suit from Sean O'Connor, creator of the 1996 game with the same title.