Annihilation

A weekly challenge mode that rewards a significant amount of Orundum, the primary gacha currency in Arknights. It's a crucial weekly activity for all players.

• Structure:
  • Permanent Maps: There are typically four permanent Annihilation maps available at any given time (e.g., Lungmen Outskirts, Lungmen Downtown, Chernobog, Frozenforged Sunder).
  • Rotating Fifth Map: A fifth Annihilation map rotates periodically, offering new challenges and sometimes different enemy types.
  • Enemy Kill Count: Each map has a maximum enemy kill count (usually 400). Your goal is to defeat as many enemies as possible.
  • Weekly Orundum Cap: You can earn up to 1800 Orundum per week from Annihilation, distributed based on the highest kill count achieved across all maps.
• Rewards: Up to 1800 Orundum per week. This is a substantial amount and essential for pulling on banners.
• Strategy:
  1. Prioritize reaching 400 kills: Even if you can't full clear a map, aim for the highest kill count possible on the easiest map you can manage. Reaching 400 kills on any map grants the full weekly Orundum amount.
  2. Use auto-deploy: Once you've cleared a map with 400 kills (or your desired kill count) manually, you can use the auto-deploy function to farm the Orundum weekly without manual input. Ensure your auto-deploy is stable and can consistently reach your target kill count.
  3. Focus on a strong core team: A well-rounded team with good AoE damage (AoE Casters, AoE Snipers, Centurion Guards), strong single-target damage (Duelist Guards, Marksman Snipers), and reliable sustain (Medics, Defenders) will excel here.
  4. use guides for difficult maps: For newer or more challenging Annihilation maps, consult community guides for optimal operator placements and strategies to achieve 400 kills.
  5. Sanity Cost: Annihilation stages consume 0 Sanity for the first clear, but subsequent clears (including auto-deploys) consume 10 Sanity. This is a very efficient use of Sanity for the Orundum reward.