Particula

Particula is a tower defense game, in which the struggle is between the playing character's mind and an evil force trying to overcome it with attacks consisting of negative affections quality and desires, such as Betrayal, Laziness, Revenge, Cheat.

We can place a power in every defensive position ('tower') in the map. Powers belong to three kinds (ice, fire, poison) and there is three of them per kind, as well as three are the parameter defining a power: damage it brings, attack speed, and its skill: the former two can be enhanced with energy earned from defeating enemies. The game can't be paused, enemy waves are separated from each other by approximately 15 seconds — needed to replace powers or place new ones on empty positions, upgrade those already there on the field, all of which can, however, be done at any moment —, and their amount is fixed (25 per game).

Experience and energy are gained by winning battles, and there is a level statistic rising with experience, that increases the playing character's power. The game map is displayed from a mix of isometric (far views) and top-down (the closer ones) standpoint; action is accompanied by one ambient music track, and, likewise, there is no graphical change from a map to another. There are five difficulty levels, three scenarios (Parallel Universe, God's Mind, Blue Lights), singleplayer and multiplayer (offline co-op, online, cross-platform) modes.