1) DOS game 2) Freeware game 
Liero is a video game for MS-DOS, first released by Finnish programmer Joosa Riekkinen in 1998. The game has been described as a real-time version of Worms (a turn-based Artillery game). It has many weapons and sounds from its precursor, MoleZ. `Liero` is Finnish for earthworm and is pronounced liero. Later on, this game provided inspiration for.....