Death Ground Death Ground is a competitive musical installationgame for two players. The work is designed to provide the framework for the playersparticipants in which to perform gamemediated musical gestures against eachother. The main mechanic involves destroying the other playeru0027s avatar by outmaneuvering and using audio weapons and improvised musical actions against it. These weapons are spawned in an enclosed area during the performance and can be used by whoever is collects them first. There is a multitude of such powerups, all of which have different properties, such as speed boost, additional damage, ground traps and so on. All of these weapons affect the sound and sonic textures that each of the avatars produce. Additionally, the players can use elements of the environment such as platforms, obstructions and elevation in order to gain competitive advantage, or position themselves strategically to access first the spawned powerups.

Checking the Difficulty of EvolutionaryGenerated Maps in a NBody Inspired Mobile Game This paper presents the design and development of an Android application (using Unreal Engine 4) called GravityVolve. It is a twodimensions game based on the NBody problem previously presented by some of the authors. In order to complete a map, the player will have to push the particle from its initial position until it reaches the circumferencexe2x80x99s position. Thus, the maps of GravityVolve are made up of a particle, a circumference and a set of planets. These maps are procedurally generated by an evolutionary algorithm, and are assigned a difficulty level (xe2x80x98Easyxe2x80x99, xe2x80x98Mediumxe2x80x99, xe2x80x98Hardxe2x80x99). When a player completes a map, heshe will have access to a selection system where heshe will have to choose the level of difficulty heshe considers appropriate. So, the objectives of this study are two: first, to gather a considerable amount of votes from players with respect to their perception about the difficulty of every map; and two, to compare both, the userxe2x80x99s difficulty feeling and the difficulty given by the algorithm in order to check their correlation and reach some conclusions regarding the quality of the proposed method.