Before we start, here's the link for a 'useful-to-know-about' guide:
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2133235982
Alright, now you know that this is actually a game that you can't play alone. On this point on, I'm ending my guide and wish you luck I suggest you to download Microsoft Edge and Google Chrome.

Q1: Why do I need Google Chrome browser?
Q2: Why do I need Microsoft Edge browser?
A: In order to play Drawful 2 game you need 4 players minimum. Both Edge and Chrome can be activated in incognito-mode, which you can use as totally different browsers.

In other words: 4 players are required, each player receives his own browser's page. A simple example is written below:
For player 1 (my VIP player, who'll obtain achievements) we'll use the main Chrome's page.
For player 2 we'll use the main Edge's page.
For player 3 we'll use the page of Chrome's incognito-mode.
For player 4 we'll use the page of Edge's incognito-mode.

Q1: I heard this game supports up to 8 players. How to get more of them solo?
Q2: I understand how to add players manually. What about audience?
A: In order to add audience manually you need to get 8 players first. Each player that follows after player 8 is considered to be an audience member.

Thanks to Chrome's and Edge's incognito-mode you can create up to 4 players, meaning, you can easily start a game. Sadly, you need more people for We Like to Watch achievement. Here's a few tips for you guys:

• There is a special Jackbox.FUN - a russian analogue of Jackbox.TV, which works the same, but it allows you to join to your game via the same browser. Please look at the screenshot below:
  
  
  
  As you can see, I'm using Incognito-mode of Microsoft Edge browser, but different Jackbox, which gives me two players instead of one.
  
  One more example of Jackbox.TV and Jackbox.FUN:
  
  
  
  Without further ado, let me tell you the other tips.
  
• The more browsers you use, the better. There are plenty browsers around the net, keep trying until you find the one that gives you +1 player.
  
• You'll probably need at least one coop-partner for We Like to Watch achievement. You create your players, he creates his players... Unless you find enough browser's pages, which provides you 18 (8 players + 10 audience members) pages. And please avoid doing what is depicted below:
  
  
  
  It is a waste of time, you'll face up with disconnects and errors, so do yourself a favor and avoid repeating my mistakes...

That's all about tips. Now let's get back to Question-Answer thing.
Q: What happens if I create 18 different pages via same browser
A: I told you to avoid repeating my mistakes... You'll get 17 'disconnect' windows, because Jackbox remembers your previous entry: your new entries overwrites your old entries (you'll see a lot of 'disconnect' windows in your old pages). Here's the example of such a window:



Q: What happens if I create 9 different pages on Jackbox.TV and 9 different pages on Jackbox.FUN via same browser?
A: You'll get 8 'disconnect' windows on Jackbox.TV and 8 'disconnect' windows on Jackbox.FUN.

Q: What happens if I create 18 different incognito pages via Microsoft Edge?
A: According to my precious friend, you can use Edge's incognito pages to create players and then, audience members. Meaning, this guide would be much easier and shorter!!!
My friend used 16 incognito windows of Microsoft Edge in order to help me with I Like to Watch achievement, the other 2 was made by me using Microsoft Edge's incognito page with Jackbox.TV and Jackbox.FUN respectively.

To tell you the truth, the reason I downloaded Microsoft Edge was simply because of my friend's trick. Unfortunately, that trick of his never worked for me: Jackbox remembed my name and my room code for unknown reason, which leads to overwriting process and thus, to 'disconnecting' windows, description of which you can see in previous answer.

Q: What happens if I create 18 different pages via Google Chrome?
A: I don't know...

Q: Is there a way to start a game without Microsoft Edge?
A1: Another solution to start a game was proposed by Maarkuuzaa
You can install the extension for Chrome called 'sessionbox' - a free multi login to any website extension. According to him, this extension allows you to create different jackbox.tv's pages. In other words: you don't need microsoft edge and other browsers. Here's his full comment: "With Chrome look for SessionBox extension and add it, when prompted do not create an account as it's not necessary. Then go to jackbox.tv enter your room code + name and click play. After that you should click on the SessionBox extension icon (upper right, click in the puzzle piece if not pinned to bar) and hit the "plus" icon that says 'New Stored Session'. With that you should now have a brand new chrome tab for jackbox.tv with the possibility of entering room code + name for player 2. Finally, repeat this process X times as needed."
A2: Another solution to start a game was proposed by Kaysoky
Here's his full comment: "Also, you can get multiple users via Firefox by navigating to their "about:profile" page, and creating a profile for each player. Then launch a new browser for each profile. No extensions or add-ons required".

Windows 7 users should download Microsoft Edge from Microsoft's site. Windows 10 users should have Microsoft Edge installed already...
I would like to say Thank You! to my precious friend, who
a) suggested to download Microsoft Edge and perform his trick, the description of which you may see in introduction's Q/A;
b) inspired me to write a guide on this game;
c) helped me with We Like to Watch achievement (his profile's link is written below):
https://gtm.steamproxy.vip/id/2439310623/

Alright, I'll write the step-by-step guide to download this browser (please read the introduction and pay attention to Q/A. You may see a description of a special trick that works only with Microsoft Edge's incognito-mode. If that tricks works for you, then you are lucky).

Step 1: Download Microsoft Edge from Microsoft official site. Here's how it looks like:



Step 2: Run the installation, do not sync Edge with Google Chrome or any other browser! Here's the welcoming screen of Microsoft Edge:



Here's the first page. Pick 'Continue without importing':



Here's the second page. What you pick doesn't matter, I picked the middle option:



Finally, the last page. Just continue without signing-in.



The incognito-mode of Microsoft Edge is called InPrivate window and depicted below:



Here's how 18 separate InPrivate windows looks like:



Step 3: Congratulations, now you have Microsoft Edge. Feel free to delete it once you get 100%. Download Google Chrome on your own from here. In the end you should have something like this:

Let's start with achievement hunting. Once again, a step-by-step guide.

Step 1. Once you press 'Play Drawful' you'll get room code. Alt+Tab the game, go to Jackbox.TV, input your room's code and the name. I highly recommend you to call yourself as 'Player 1' or simply '1'. The first player who joins Jackbox.TV is always VIP, meaning he must press the final button, which starts the game itself (if all players drew something). Here's the example:



As you can see on the screenshot above, each player drew their number. If you (as VIP, obviously) try to draw something like this, then you'll obtain two easy achievements:



The following achievements are yours (2/10):



Step 2. Since you are not even started a game yet, 'create' three more players (see the example on the first screenshot in this section). Once you do that, go to your VIP's page and begin the game. Here's the second example of how it looks:



Step 3. Let your player 2 draw something. Ignore all other players (let the timer ends):



Since you control all players, your player 1 must guess what exactly player 2 draw. Guess the title correctly 3 times in a row in order to get the following achievement:



Now you probably confused, let me tell you something important: each 4-player game of drawful have two rounds. In each round players 'discussing' the drawings they made. If only player 2 draw something, while the others were ignored, then round 1 ends once three other players discuss player 2's drawing. Guess his title correctly in this round.
In the second round let player 2 and player 3 draw something. Ignore player 1 and player 4. Once you guess player 2's title again, you'll get a strike. Now do the same with player 3 and you'll get a 3x strike, which awards you with achievement (3/10).

Step 4. Congratulations, you finished the second round of the game and the game itself (1/50). How much time it took? Anyway, 49 games left to go for the last achievement:)
Anyway, begin a new game. This time, we'll get three achievements in one game.


In order to get this achievement you need to write 'word spud 2' in title window. Once you do that, you'll get the achievement (4/10).


Once you get to the second round of the game (or to the next drawing), ignore the title-guessing, let the time pass. The answer-picking window is used to be the mixture of the correct title and the title of three other players. Since they remain silent, you'll get the mixture of the correct title and three decoy title. The achievement pops up once your player 1 picks a decoy answer (5/10).
In order to fool other players, just remain silent on the answer-picking window (do not pick any answer, even the decoy ones). This awards you with a third achievement you got during your 2nd playthrough (6/10). Congratulations, 48 games left!



Step 5. Do you like this guide? Anyway, now we'll talk about likes! Your player 1 needs to get 50 likes! The best solution for this is to create 8 players and at least two audience member. In order to increate the number of manual players see the tips in introduction. I used the following browsers: Google Chrome, Microsoft Edge, Internet Explorer, Yandex with both Jackbox.TV and Jackbox.FUN:



So, for this achievement, I suggest you draw 7 drawings (skip player 1), once the time's off, the second window appears, where you need to input the title. Do the opposite: let only player 1 type something in there. For example: simply type '1'.



As you can see on the screenshot above, it is my first playthrough for this achievement... In the end I got 47 likes, which is... sad. Don't repeat my mistakes and create at least two audience members!

Once the time's off, the third window appears, where you need to pick the answer. It doesn't matter what you pick, the only thing matter is the fourth window, which appears immediately once you pick something. That fourth window is where you give likes. Give all the likes to '1' (1'st player's title):



Here's my ending screen:




The game will take some time but in the end (3/50) you'll get what you deserved (7/10):



Step 6. Now you know how to get at least two audience member. If you think you can create 8 more members, then you'll do the following achievement solo, otherwise you'll need a coop-partner, who'll create his own players along with you.


Once you end the game (4/50), the achievement is yours (8/10).


Step 7. This time instead of 'Play Drawful' pick the 'Make your own' option. It gives you the room code. Go to Jackbox.TV and enter the code. Choose the name, choose the prompt. Here's the screenshots:






The following achievement should be yours (9/10):



Step 8. In order to unlock the last achievement you need to play 50 games. If you playing with this guide, then 46. Here's my advice: since 4-player game of drawful has 2 rounds, let them pass quickly by creating only one drawing in each round. Here's the screenshot of the time it takes to complete one game towards 50 games of drawful 2 with my advice:



Thanks to Ultionys you may now use another approach to this achievement. According to him, 8-player game of drawful has only one round! Just like before, only one drawing is required. The approximate time of ending is 4 minutes!

It took 10 hours for me to complete this game (10/10) and write an achievement guide. I wish you patience!