RUINER is a top-down shooter developed by Reikon Games and published by Devolver Digital. The game is set in a cyberpunk world, where the main character, Puppy, is on a mission to save his brother from the Heaven conglomerate, owned by the Boss. RUINER is a fast-paced, isometric shooter with a mix of abilities and weapons that players can use to complete the game.

The game is inspired by Hotline Miami, and the gameplay is a careful mix of all the game mechanics. The players' arsenal includes a pistol, an assault rifle, a pipe, a Nanokatana, and a two-handed sword. The players can hack turrets, doors, guns, or the enemies themselves. The game puts a heavy emphasis on hacking, and the players can always upgrade their abilities.