 Further ambiguities arise when determining whether a game is a first-person "shooter", as in certain games such as "Narbacular Drop", the player doesn't shoot anything at all, but merely clicks walls with the cursor.Similarly, in games such as "realMyst", the player merely interacts with the environment by touching things in the first-person and the term "shooter" is seen to be objectively inaccurate.Despite this, non-violent first-person games have often been characterized oxymoronically as shooters because of all comparable genres, these games are most closely similar to the FPS and often employ engines designed for the FPS genre.