Collider

Collider is the penultimate level of the Campaign, and is a combination of four unique enemy waves and a boss battle with Liquorice.

Many consider this to be the hardest Campaign level in the game.

Pre-boss waves
Collider's first half has a unique enemy composition. Surviving is not difficult, but if you're looking to achieve an S+ Rank your skills will be challenged.

Boss: Liquorice


Once all four waves are completed, Liquorice will appear. She is an android just like you, and plays by the same rules. Her own battery meter that starts full (60 seconds), and is displayed at the bottom of the screen.

Some other mobs will spawn (Buster Titans, Kegs, Fidos), but they don't pose much of a threat. They are there to buffer the chain and to spawn Batteries, which you must collect before Liquorice does. Your goal is to collect enough batteries such that Liquorice's battery runs out before yours does.

Liquorice
Liquorice uses her Cannon primarily, and will often switch to her Vorpal Blade and try to line up a dash towards you, (If she can't, she will switch back to her cannon). She will only ever use fully-charged attacks, meaning that you can knock her down while she charges it if you have sufficient DPS or burst damage. You can even counter it with your own quick Vorpal Blade if you are also playing as Liquorice. If neither of these options are available, a well timed weapon switch or simply running away will avoid damage.

Liquorice can take 35 damage before being knocked down (compared to your 5), which scales with the number of players like any other boss. Her bullets deal 4 damage, meaning that she can knock you down in two hits.

Since Liquorice deals red damage, she can damage mobs herself in order to try to spawn the Battery. If she picks up Firepower the bullets will deal blue damage (ie. only damages you), however they fire significantly slower bullets and fire much less rapidly.

Liquorice can pick up weapon power to upgrade her weapon, as well as Powerups. If she collects a Shutdown she will gain the temporary invincibility and you will become slowed if hit by the wave (though the wave can be Weapon Swapped through). Ideally, prevent her from picking up anything, and repeatedly knock her down to keep her weapon power low. In particular, the Battery attraction Accelerate grants is a significant benefit to keeping on top of battery life and a significant problem if Liquorice picks it up.

Scoring
After Liquorice appears, enemies don't count for score, but they still extend your Combo chain and timer. Surges are also disabled.

Knocking down Liquorice increases the Combo chain timer to 10 seconds, and you receive a score bonus when she runs out of Battery, which is affected by your combo multiplier. You also receive a larger score bonus the quicker you end the battle.

Therefore, your goals during this phase are:


 * Don't drop the chain, in order to receive the maximum score bonus for defeating Liquorice.
 * Don't give Liquorice any batteries, or you will receive a significantly lower time bonus and completion bonus.

Strategy
Knock Liquorice down a lot. It extends your combo timer, keeps her weapon power down, removes her powerups and gives you breathing room to collect things and recover health.

Don't let her pick up anything if you can help it.

Get a good feel for when the next Battery is due, and collect it ASAP before she does.

Use the pillars to your advantage. Most Androids have some way of shooting around or over the pillar, and failing that you can just kite her around the pillar or pop out to burst her down before she can react. You can also pop out when she weapon swaps to anticipate and counter a charged Vorpal Blade.

Unlike most enemies, Liquorice will lead her shots, meaning that moving in a straight line is as unsafe as standing still.