WET is an action game that combines shooting and swordplay with stylish acrobatics. The main character, Rubi, carries twin pistols (revolvers) and a sword, and can fire whilst jumping, sliding on her knees and running on walls. During these acrobatic actions, the game will enter slow motion, and she will automatically aim at a second enemy, allowing the player to shoot at two enemies at once. She can also combine her attacks, such as wall running off a person, or performing a sword uppercut while sliding. Racking up kills and collecting multiplier icons gains multipliers, which increase score and the rate at which Rubi regenerates health. Rubi can also regain health by finding bottles of whiskey; when activated, she takes a swig from the bottle, then throws the bottle into the air and shoots it.
In some sections of the game, Rubi’s face will get covered in blood and she will go into a murderous rage. These sections are presented in noir style, with bold red, black and white visuals. Rubi’s attacks become faster and stronger to fight against large amounts of enemies during these sections, and killing chains of enemies extends her psychotic fury. There are also motorway sections that feature shooting integrated with quick time events.
At the end of each stage of play, the player will be graded on three different factors: Completion Time, Acrobatics, and Average Multiplier. Based on performance in these areas, Style Points will be given, allowing the purchase of upgrades to both Rubi and her weapons. Different upgrades include additional health blocks for Rubi, as well as increased firing rate and damage for the pistols, shotguns, SMG’s, and crossbows.