Quantum Suicide has both violent content and adult themes. As the player, you partake in a "deletion game", which the loser is then executed. There are CG's for each of these executions. The game also allows for paths that have romantic themes. There are suggestive CG's such as kissing, in showers and baths (no nudity seen) and beachwear. There is also reference to, and CG's including alcohol usage.