Raid Mode is a standalone, arcade-style game mode that offers a significant amount of replayability and content beyond the main campaign. In Raid Mode, you choose from a roster of characters (unlocked by progressing through the story or completing specific challenges), each with unique skills and abilities. You then embark on missions, which are typically modified versions of campaign levels, with the objective of reaching the exit while defeating waves of enemies.

Raid Mode features a robust progression system:
- Character Leveling: Characters gain experience and level up, increasing their stats.
- Skill Trees: Each character has a unique skill tree, allowing you to customize their abilities and playstyle.
- Weapon Customization: Find and upgrade weapons with various parts, enhancing their damage, fire rate, capacity, and special effects.
- Gear & Perks: Equip different pieces of gear and perks to further boost your character's performance.
- Mission Types: Missions vary in objectives, enemy types, and difficulty, ranging from standard clear-the-area to timed challenges.
- Online Co-op: Raid Mode can be played solo or with a friend online, adding a cooperative element to the experience.
Raid Mode is an excellent way to earn Battle Points (BP) and unlock new weapons and parts, which can then be used to tackle harder missions. It's a challenging and addictive mode that provides hours of additional gameplay.