Assorted commercials for the mobile game Arknights. These short animations aired on TV and were posted to Arknights YouTube channel, while additionally shared via Twitter, advertising the game and associated events after its Japan launch. 
 
The list of the commercials are as follows (note that CMs without animation are not present and, for the ones with long and short versions, the longer version is taken into consideration)
 
1) Official Animation Trailer (アニメPV) [7 January 2020] 
2) Grani and the Knights’ Treasure (騎兵と狩人) [30 January 2020] 
3) EP05 Necessary Solutions (第五章「快刀乱麻」) [5 March 2020] 
4) Operational Intelligence (戦地の逸話) [25 March 2020] 
5) Heart of Surging Flame (青く燃ゆる心) [21 April 2020] 
6) Code of Brawl (喧騒の掟) [25 May 2020] 
7) Partial Necrosis (第六章「局部壊死」) [22 June 2020] 
8) Ancient Forge (洪炉示歳（エンシェントフォージ）) [22 July 2020] 
9) Stories of Afternoon (午後の逸話) [25 August 2020] 
10) Children of Ursus (ウルサスの子供たち) [25 September 2020] 
11) Twilight of Wolumonde (ウォルモンドの薄暮) [22 October 2020] 
12) Darknights Memoir (闇夜に生きる) [8 December 2020] 
13) The Birth of Tragedy (第七章「苦難揺籃」) [24 December 2020] 
14) Heart of Surging Flame - Rerun (復刻「青く燃ゆる心」) [18 January 2021] 
15) The Great Chief Returns (帰還！密林の長) [19 February 2021] 
16) Rewinding Breeze (在りし日の風を求めて) [22 March 2021] 
17) Maria Nearl (マリア・ニアール) [5 April 2021] 
18) Roaring Flare (第八章「怒号光明」) [21 April 2021] 
19) Mansfield Break (孤島激震) [18 June 2021] 
20) Beyond Here (彼方を望む) [2 July 2021] 
21) Who Is Real (画中人) [22 July 2021] 
22) Operation Originium Dust (オペレーション オリジニウムダスト) [13 August 2021] 
23) A Walk in The Dust (遺塵の道を) [28 September 2021] 
24) Under Tides (潮汐の下) [15 October 2021] 
25) Preluding Lights (灯火序曲) [6 December 2021] 
26) Dossoles Holiday (ドッソレスホリデー) [9 January 2022] 
27) Stormwatch (暴風眺望) [15 March 2022] 
28) Pinus Sylvestris (赤松林) [11 April 2022] 
29) Near Light (ニアーライト) [21 April 2022] 
30) Break the Ice (風雪一過) [27 June 2022] 
31) Invitation to Wine (将進酒) [23 July 2022] 
32) A Light Spark in Darkness (闇散らす火花) [16 August 2022] 
33) Guide Ahead (吾れ先導者たらん) [13 September 2022] 
34) Shatterpoint (第十章「光冠残蝕」) [17 October 2022] 
35) Stultifera Navis (狂人号) [21 October 2022] 
36) Lingering Echoes (塵影に交わる残響) [23 December 2022] 
37) Ideal City: Endless Carnival (理想都市-エンドレスカーニバル-) [7 January 2023] 
38) Dorothy's Vision (翠玉の夢) [10 March 2023] 
39) An Obscure Wanderer (夕景に影ありて) [27 March 2023] 
40) Return to Mist (第十一章「淬火煙塵」) [24 April 2023] 
41) IL Siracusano (シラクザーノ) [15 May 2023]

Arknights Animation PVs

kokihanada

Skadi

feater

mudrock

perfumer

blemishine

blaze

Chinese

arknights