Re:BIRTH has a lot of modes, and new players often spread themselves across all of them at once. Here's what each one is actually for - and which heroes earn their keep there.
Adventure & Nightmare
The story campaign and its harder mirror. Your top priority - it unlocks everything else and pays out Rubies and materials. Bring your best general team; Lu Bu, Freyja, Velika and Teo shine here.
Ruby farming stages
Repeatable stages you'll clear thousands of times. Speed beats difficulty - farm the highest stage you clear fast. AoE carries rule: Lu Bu, Freyja, Velika.
Power-Up Dungeons
Material dungeons for leveling and enhancement. Hit them on their bonus days and don't overthink the team - your farming core works fine.
Gear Raids & Sudden Raids
Boss fights that drop the gear your account will eventually be built on. Start the day they unlock. These want sustained single-target damage: Pascal, Shane, Espada, glued together by Biscuit.
Castle Rush
Score-attack bossing against a shared boss - same raid logic, leaderboard flavor. The raid core carries here too.
Advent Expedition
Rotating high-end boss content with its own team-building puzzles per boss. Endgame material - arrive with a developed roster and check each boss's gimmick before committing resources.
Tower of Trials
Floor-climbing challenge content. Steady progress with a balanced team; sustain matters more with every floor.
Arena (PvP)
Ranked player-vs-player. Early on, do your battles for the rewards and move on - real climbing starts when your core is geared. Meta names: Lu Bu, Rudy, Reginleif, Kagura, Karl Heron, with Lina and Aris anchoring tank teams.
Guild vs Guild
Team-scale PvP through your guild - one more reason joining an active guild early is non-negotiable. Defense comps mirror Arena logic.