GUSANOS is, as other similar projects, a clone of the DOS game Liero.
Just as in Liero, in GUSANOS each player takes control over a worm, a small crawling creature armed to the teeth, and shoots their opponents to death as many times as possible. The game type can be described in short as “Real-time Worms” or “2D Quake”, or a combination of both.
The gameplay is very much the same as in Liero. Hardcore Liero players will find GUSANOS very familiar. Newbies, on the other hand, may find the game a bit hard to dominate at first.