It seems like most posts here are only the anniv PVs and animations, and not much else. So I'll try and get a summary of it all (even the gamepress one isn't exactly "complete" but then again the EN/JP streams left out many things, even the KR stream that is the shorter of the three)

I'm also on mobile so I will probably not be able to insert image links, sorry.

So, global version will be having the anniversary event much earlier than expected (December 30 instead of January 16, which is when the game launched). It runs for 2 weeks (Dec. 30 - January 13)

Here are the things that will happen, and the rewards that we will get (as per CN version and the combined EN/JP/KR streams)

• The limited anniversary banner, which consists of:
  

W (Limited SSR/6* AoE Sniper which has good nuke + crowdcontrol. She can almost hold a whole lane by herself with her 2nd skill)

Weedy (Permanent 6* Specialist Shift/Pusher that is stronger than all the pusher units in the game. She can push even the heaviest unit in the garbage with her 3rd skill...even more push if you use Angelina's Gravity-defying 3rd skill = Angelina is another 6* that is a Supporter that can dish out damage and slow in an AoE)

Elysium (or Dimas, in which the SEA players call him...probably an Indonesian meme? I dunno) is a 5* Vanguard, basically a male version of Myrtle aka DP Printers. They dish out DPs aka Deployment Points so that you can drop other units faster. They have 1 block which reduces to 0 if you use their skills, which isn't really a disadvantage personally.

Keep in mind that while the SSR rates are a bit generous (2%), the rateup is wew lad (50%), however the SSR rateup is kinda different on the limited banners (70%) so it's kinda 70% (pls correct my maffs) that you get W or Weedy, or a 30% of a random spook. What's worse is that Weedy and W will share that 70% SSR rateup. Meanwhile, it's also 50% rateup for a 5* (same for non-limited and limited banners, but limited banners generally have only 1 5* rateup (as compared to non-limited and standard banners) so you will get used to a lot of Elysium copies (If you hoarded lots of pulls)

Also to note: Limited banners have these 'procurement tokens'. You get 1 of this token for every pull you get. 300 pulls will net you a free SSR on a specific pool (based on the CN anniv, you can get W, Weedy, or Elysium). So the limited banner has some kind of 'sparking' I guess. 300 pulls is still a LOT. As F2P you need to save atleast 6-7 months just to get 300 pulls. Any unused procurement tokens will be converted into points that you can use for exchanging materials

• Also, Chapter 7 (Birth of Tragedy) will be opened. It is doable with supports and elite1 (mininum levelling required) units. If you rush from ch0 to ch7, you will get like 40-60 pulls...not sure sorry, someone might wanna fact check.
  
  
• Lastly, Purchaseable skins (I will not delve deeper in this, but one thing to note is the BDSM Angelina skin that has lotsa belts...kinky. If you wanna buy it, it costs 18 OP; regarding skins: 15 OP skins are just character and sprite changes but 18 OP skins have special effects. Not really flashy personally but I buy nonetheless)
  

Here are the rewards

• Free 10x HH ticket (10 pull) for use in the Limited Banner
  
  
• Free 1 daily pull for the Limited Anniversary Banner (14 days = 14 pulls). Keep in mind that you cannot accumulate the free daily pulls, so you need to use them ASAP
  
  
• Free 5* unit Savage. She is an AoE Guard (Blocks 3 units) and has a 2nd skill nuke. She isn't that amazing, but she isn't bad either (She has good art especially her 2nd Promotion art = 2nd promotion/elite 2 is the final ascension stage). She is considered one of the rarest units in AK, due to that you cannot get her from gacha nor recruitment. HyperGryph only gave her during launch, and now on 1st anniversary (So launch players will have 2 Savages by then)
  
  
• Mini login event that goes for 14 days. You will get 14 Originite Primes aka OP (Used for refilling stamina, skins, or gacha = 4 OP per 1 pull)
  

Aside from the OPs, you will get a free 1* robot unit named THERMAL-EX (voiced by Hikaru Midorikawa which also voiced Diarmuid in Fate/Zero)

THERMAL-EX is a 1* robot unit that explodes upon dropping, dealing AoE damage and applies -ATK and -DEF to the affected units. He has a good base skill though, so he is definitely worth it. Major disadvantage is that he has a long Redeployment time AKA you drop him once per battle...unless you have Chiave (5* Vanguard that reduces redeployment time of robot units)

Lots of EXP, LMD (Cash), and Materials for promoting units

Also a free skin for Amiya (The Mascot/Heroine of AK, kinda like Mash of F/GO).

• We will also have the first Recruitment Update, whereas some SSRs will be added in the Recruitment (consider it like the free gacha of Priconne or that friend points pull from F/GO). More information here: https://www.reddit.com/r/arknights/c...t_pool_update/
  
  
• A farming and achievements event where you can get stamina drops by doing stages (protip: unlock stage 1-7 and spam that shit. Enjoy the free stamina for next event)
  

That event is called Bloodline of Combat:

You farm stages with a chance of a 'sanity cargo drop' AKA free stamina refills (worth 10 stamina for 1 cargo drop) It has a low chance of dropping, but more runs = more chance of drop, so you should spam 1-7 AKA "Rock Hell" (costs 6 stamina per run, and you have at most 240 stamina per day, hence the name).

• Additional shit like daily login missions that goes for 10 days, where you get rewards and coins/points that will increase the point ladder
  

What coins/points? Bloodline of Combat is also a ladder point event, in which you get materials based on how much coins/points you get:

You get points based on total stamina spent, total EXP given to units, etc.

Noteworthy to note is that you get a free skin for a 3* Defender Beagle. A standard unit with a Defense buff as a skill. Not really wow factor but a good tank in early game. Also, her skin is amazing.

You can check the rewards here: https://gamepress.gg/arknights/event...event-missions

• Another login reward that goes for 3 days. You get 5 pulls, LMD, and high-tiered Materials used for promotion (These high-tiered materials are very worth)
  

Not to mention:

• OP packs refresh, which resets the x2 bonus. If you are a dolphin/whale, it's worth
  
  
• 6* selector pack with an additional 10-pull ticket that goes for $30. You can select the SSR you want (Limited pool but it has Blaze, a very good SSR AoE Guard that you can trust your ass with. Tanky as fuck and deals good ass damage)
  
  
• The anniversary pack that goes for $50. It's very worth for spenders. The contents are:
  

90 OP, 1 10-pull ticket, LMD, EXP, and lots and lots of Materials (Sorry if there's not much info, but the worthy thing here is the OP to USD ratio as well as the 10pull)

If you are starting now, now is a good time.

• Aside from the free shit, new players will have free 3800 orundum, which you can use in the permanent Beginner's banner. (which has reduced orundum required, which translates to a free 10 pull in that banner if you plan to use that 3800 orundum) What's more is that it has 20 pulls that DOES NOT EXPIRE so you can let it stay until you decide you want an SSR. The beginner's banner also has a guaranteed SSR/6* unit. Try to go for Silverash because he is: Husbando, Broken 3rd Skill, easier to raise because of the materials that we will get during the login rewards coincide with his materials
  
  
• Tip: It's easy to reroll, just use salted email method (youremail+1@email.com) or if you are rooted, just remove the sharedplayerprefs.xml and reset advertising ID
  

Personally it isn't much for new players unlike other anniversary shit of other gachas, and it benefits those who started earlier or atleast 6 months before anniv. But hey it never hurts to try! Rerolling is easy and it never redownloads anything (salted email method) so might as well try to get as many SSRs as possible (before uninstalling xD)

If you guys have anything to say/corrections please do. I may have said or did something wrong.

EDIT: LOTS, and included the Bloodline of Combat event

EDIT 2: 300 pulls gets you a free SSR pick on a specific pool, not of your choice

EDIT 3: I was wrong about the procurement tokens carrying over, removed and changed.

EDIT 4: Changed the SSR rateup on limited banner because it's different from the standard banners

EDIT 5: Changed 2800 into 3800 orundum

EDIT 6: Added the Recruitment Update

EDIT 7: Forgot to mention that the free 10x pull is only usable on the Limited Banner. Not like there's other good banners going at the same time really.