In the game Undead End Hardcore, you can use the directional arrow keys to move. Press space to jump, Z and X to use a weapon. Press A to open the doors or to perform an action. Search for the doors or the red arrows on the floor. Press A to open a door or a passage. Swap your current weapon. Kill all enemies on your way to find the keys. This is a free action game provided by www.flash-game.net. Enjoy your time in it!