Thunder Cross (サンダークロス Sandā Kurosu?) is a horizontally-scrolling shoot 'em up arcade game released by Konami in 1988. It used a "layered scrolling" background, a new 2D graphics technique at the time. The game spawned a sequel, Thunder Cross II, in 1991. Owing to several similarities, Space Manbow (1989) may also be considered a spin-off. In 2007, Thunder Cross was included as part of the Oretachi Geasen Zoku Sono budget series on the PlayStation 2 in Japan. It was re-released ten years later for PlayStation 4 on June 8, 2017 in Japan and Nintendo Switch on February 11, 2021 as part of Arcade Archives.
Taking place in the future of space colonization, the planet Haniamu IV is under attack from a relentless, unknown military force known only as Black Impulse. The strongest Earth ships capable of stopping the total conquering of the planet are the Blue Thunder M-45 (player 1) and its earlier make the Red Thunder M-24 (player 2).
Thunder Cross is a classic horizontal shooter with 7 stages. Players control the Thunder fighter with up to four "options", which arrange up and down vertically and attack at the player's will. Three weapons are selectable; ranging from the Vulcan shot to the Laser and the Boomerang shot (which doubles as a ricochet weapon). End-of-level bosses were present and, typical of a Konami shooter, Thunder Cross forced the player to beat the game twice in a harder Loop of the first seven levels.
- Thunder Cross Konami Arcade Game Soundtrack was released on CD on May 21, 1989 in Japan, and it also contains music from A-JAX, Salamander, Hot Chase and Gradius II. It was reprinted on May 21, 1993.
- An ending theme from the arcade version of Thunder Cross was a part of Konami Ending Collection, which was released on CD on October 21, 1991.
- The tracks 30 to 42 from Thunder Cross were included on MIDI POWER ver.4.0, released on CD on March 24, 1994 in Japan.
- In addition, disc 5 of Konami Music Masterpiece Collection, which was released on October 1, 2004, exclusively includes music from Thunder Cross.