Enemies

Warning, spoilers!This page contains spoilers for the game Operius.
If you haven't played trough most of the game, don't visit here, as it may ruin the surprise.
**The Enemies** are Alien Invaders that have the objective to kill you. They appear in Arcade Mode, Co-Op Mode and Endless Mode. There are 6 different types of enemies, which appear in different sectors. They appear in different colours depending on what sector you're playing on.

## UFO

The UFO appears in the very first sector. It's made of a cuboidal base with a smaller cube on top. The Enemy is also rotating. It will always move in a pattern around the player, either in a queue of them or just randomly. When killed, the enemy will make a particle effect. The colour for the effect will be different for each sector.

## Cube

The Cube origins from sector 4, where it is seen as a group. The Cube will shoot out small projectiles in a straight line that you will have to avoid. The Cube has 2 forms which include appearing on it's own and as a spiral formation with other cube enemies.

## Twister

The Twister appears in sector 6. Whenever you encounter this enemy, the Twister will rapidly come at you. The Twister is not one, so there will be a wave of them. Their movement is similar to the UFO, but much faster, and it doesn't move back as much as it. It will also damage you by either killing you or destroying your shield if you have one.

## UFO Boss

The UFO Boss appears in sector 5. It is the first boss in the game. The boss is a representation of a regular generic UFO that will shoot out ball-like projectiles at you that you'll have to avoid. The projectiles come in pairs, spreading out away from each other as they move towards the player in a wave-like manner. He has a white health bar that will display at the bottom of the screen.

You cannot ignore this boss unlike Mother Invader as it will always aim for you.

## Invader

    The Invader has a small chance to appear in Sector 8. However they are guaranteed to appear whenever you begin Sector 9. There are two types of Invader attacks. The first one is when they rush at you from everywhere and you HAVE to dodge them unless you have Level 3 and Level 3 only. The second one is when they appear together in groups of five. This one is easier because you don't have to move and the waves are more spread out and less haphazard. It is known to be the straight up mayhem-grade annoyance if you are new to the game.

## Mother Invader

The Mother Invader appears in Sector 9 and going forward and is the second boss in the game. It is a representation of an Invader, however, you can completely ignore this boss (not recommended) by going upside down. However it may try to realign itself with your screen. This boss only shoots out 4 projectiles at once which spread out from an epicentre, and are easy to avoid. But if you just met it, it would shoot a wave of projectiles like the UFO boss for a few seconds before shooting in a four particle pattern.

# **Trivia**

* The Twister was initially called the "Swirl"
* There was an older UFO boss that could be seen on the game's release
* UFO Boss was supposed to be named just "Boss"
* Sector 33 and beyond can have 2-3 bosses at once and regular enemies can overlap the bosses