# Spiral Knights: Operation Crimson Hammer Summer DB entity ID: 0e8d62b6\-0864\-48bd\-9dc3\-0144c85ac4d5 Steam App ID: 206521 Warmaster Seerus is the evil master of munitions within the gremlin's all\-powerful Crimson Order\. Thought to be the true mastermind behind the Roarmulus Twins and countless other gremlin weapons, he is the Crimson Order’s creator and supplier for their diabolical engines of war\. Recon Knights under the command of Lieutenant Feron recently discovered Seerus’s ‘Grand Arsenal,’ his development center and storage facility for all his weaponry\. Now, Feron himself is leading several squads of knights directly into the Grand Arsenal, with the intention of weeding out Seerus and destroying his war machines\. Met with heavy resistance, Feron’s squads require reinforcements and Spiral HQ is sending you in to assist\. Key Features: Lead the Assault Experience an all\-new adventure in the world of Spiral Knights\! Challenge the mighty gremlin lord, Warmaster Seerus, in his terrifying Grand Arsenal\! Expand Your Arsenal Includes unique mission rewards: the powerful Rocket Hammer and the shadowy Dark Retribution bomb\! Includes a bonus craft\-able helm, the Mask of Warmaster Seerus himself\! Ferocious New Monsters Face the explosive weaponry of gremlin Mortafires and the stealthy blades of Ghostmane Stalkers\! Multiple Ways to Play Unlocks three separate versions of Operation Crimson Hammer, one for each difficulty tier\! Please note: The Operation Crimson Hammer Expansion Mission Pack is available for purchase within the Spiral Knights Mission interface\. Do not purchase this DLC if you have already purchased this mission pack within Spiral Knights\. ## Game information - Type: dlc - Developer: Grey Havens - Publisher: Grey Havens - Release date: Feb 29, 2012 - Coming soon: false - Free to play: true - Parent Steam app: 99900 - Genres: Action, Adventure, Massively Multiplayer, RPG, Free To Play - Categories: Single\-player, Multi\-player, MMO, Co\-op, Cross\-Platform Multiplayer, Downloadable Content, Steam Achievements, Partial Controller Support, Steam Leaderboards - Platforms: windows, mac - Website: Not collected - Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_c080cf74521f7daa601774fdd05a7ff4478de55b\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_925469d9e21467d12f93b1eca1d5f68e78a34193\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_5dfcd2627eb88ce9f053972657c21fbd03e10e61\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_99e3a4403b2ab7de2107b0494fe423b706f2e764\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_211319120ef34bd1c72ab2bf67e227e5fd4d43f2\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_4da37d6809af898646923d8577bc6e6df8dc77e7\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_2567b9c7c3604e7127410f22f16ca6d7e11caa77\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_dc5e30569ad63d9dc614d6a3fd96af79fdb3b810\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_ca7b94672d0aed94d26fe63126c14d1fd019e64a\.1920x1080\.jpg?t=1782998947, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/206521/ss\_3a9fdf2e75e25bc72bda6faf36eb708db1aa3951\.1920x1080\.jpg?t=1782998947 - Price: Not collected - Price country: Not collected ## Observed metrics - Current players: Not collected - Steam review count: 91 - Steam positive reviews: 77 - Steam negative reviews: 14 - Steam positive percentage: 84.61538461538461% - Summer DB rating: No native votes Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\} ## Player history [Seven-day chart data as Markdown](/api/v1/entities/0e8d62b6-0864-48bd-9dc3-0144c85ac4d5/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/0e8d62b6-0864-48bd-9dc3-0144c85ac4d5/player-metrics?days=7) Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown. ## Sources and freshness - Catalog membership: store\_catalog - Catalog observed: 2026\-09\-28T16:58:32\.455488\+00:00 - Details observed: 2026\-09\-28T20:18:26\.162223\+00:00 - Player count observed: Not collected - Reviews observed: 2026\-09\-28T20:18:27\.296135\+00:00 Full provenance: \{"urls":\{"price":null,"catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/206521/","players":null,"reviews":"https://store\.steampowered\.com/appreviews/206521"\},"price":null,"source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-28T20:18:26\.162223\+00:00","players":null,"reviews":"2026\-09\-28T20:18:27\.296135\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":null,"catalog":"3f26f9f1\-9159\-42dd\-8df9\-2e20117dd7df","details":"2a93853c\-af1f\-4ebe\-b5c4\-22fd5b162c96","players":null,"reviews":"eff13b1b\-ebfa\-4c9f\-ab50\-5603ab1223fb"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\} Native rating methodology: \{"count":0,"average":null,"entityId":"0e8d62b6\-0864\-48bd\-9dc3\-0144c85ac4d5","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\} Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted. [Steam store](https://store.steampowered.com/app/206521/) · [JSON](/api/v1/games/0e8d62b6-0864-48bd-9dc3-0144c85ac4d5)