The plot is obviously simple. But that's okay, since it's just an excuse to put the player through four completely different levels of total mayhem.
Released in 1989 for Amiga and in 1990 for Sega Genesis, Battle Squadron is a Shoot'em Up that features some incredibly beautiful and advanced graphics for its time. Explosions, bullets, spaceships, scenery, everything is hand-drawn and carefully animated, the sound effects and the background music are also very memorable. Thanks to some creative coding, the authors even managed to include a unique "Predator" invisibility effect for some of its enemies. Despite its relatively slow - although adjustable to a degree, thanks to a hidden menu - pace it remains very much Nintendo Hard, like many shooters of the era. Later received a somewhat inferior port to Sega Genesis and another, improved one, to Android and iOS.
Contains examples of the following tropes:
- Ace Pilot: Two unnamed pilots in tiny "Mark 2 Cruisers" sent to the alien empire's central weapon production facility featuring some never before seen biological and mechanical weapons? True to the genre, they completely wreck the place.
- Bullet Hell: Starts of relatively easy, but ramps up the bullets quickly. This can even be further tweaked via the hidden menu.
- Endless Game: After you beat the final boss, you're treated to the ending sequence, credits roll... and then you're back at square one, ready for another go. Explained as "the whole planet changing shape".
- Everything Trying to Kill You: Even your sources of powerups will shoot at you or try to ram you.
- Hollow World: With three separate "inner cores" full of things to destroy, accessed via marked entry points on a wrapping outer layer, Terrainia definitely qualifies.
- Hub Level: The initial, relatively normal stage, which wraps around, reviving the enemies in the process.
- Level Grinding: Somewhat unusual for a Shoot 'em Up, you can stay on the hub level and power up your chosen weapon until you feel you're ready. Given the Nintendo Hard nature of the cores, it's probably well advised.
- One-Hit-Point Wonder: The player's ship.
- Organic Technology: The inner cores are full of... things, as well as regular mechanical enemies.
- Smart Bomb: the Nova Missile, notably somewhat difficult to perform... unless you're using a mouse.