TxK is an action video game developed by Llamasoft and designed by Jeff Minter. The game was released on the PlayStation Vita on February 11, 2014. The game was planned for release on PC, PlayStation 4, and Android platforms until Atari made legal threats against Llamasoft, citing similarities between TxK and Tempest 2000. It is a tube shooter based on the classic arcade game Tempest. The gameplay expands upon that of the original by including power-ups which grant the player additional abilities. The option is available to play without power-ups, however. Source: Wikipedia, "[en.wikipedia.org/wiki/TxK TxK]", available under the CC-BY-SA License.