Chelnov, also known as Atomic Runner or Atomic Runner Chelnov - Nuclear Man, the Fighter, is a Japanese side-scrolling action-arcade game developed and published by Data East in 1988. After Data East became defunct due to bankruptcy in 2003, Paon bought the rights to this game, along with a few other Data East games, which Paon comprises former Data East staff. Source: Wikipedia, "Atomic Runner," available under the CC-BY-SA License.