It was decided to write the manual due to the lack of those. The conditions for obtaining achievements are pretty clear, but the way to get them, especially on the "Legendary" difficulty level, is quite time consuming. But knowing the specific combinations of parameters of the games being developed will make this task easier. I will add that the described methods only work when the randomness options are disabled in the game settings.

It is quite difficult to manually select the optimal parameters for the games being developed. I tried to use the suggested combinations in various manuals, but it was quite laborious to read them. In addition, they sometimes become outdated and this annoyed me a little. Therefore, I decided to write an application myself, which was supposed to make my game easier. Parse game files, I developed an application. You can download the archive with it at link[drive.google.com]. It is relevant at the time of the release of the guide (game version dated 12.06.2023) and works only when the randomness parameters are disabled in the game settings. It requires the .NET Framework 3.5 to work. I will probably update it as new versions of the game are released. The interface is presented below and is almost the same as the game one. Genres that are compatible with the main genre are selected in the list of subgenres with a green background. When selected, the "Compatible Genres" field will display the word "Yes" on a green background.
The work uses formulas found in the game files. The level bar in "Design Direction" and the circular bar in "Design Priority" serve to validate calculations and should always be 0 and 100% respectively. If the value is different, then a rounding error has occurred. You can let me know in a comment with genre combinations.

I hope it will help you in the game, as it did me :)

Born to Be a Programmer
Create your own engine.
Available immediately. Since engines are another source of income, I try to make more of them and constantly update them as new technologies are discovered.

Retromania
Create a retro game.
When creating a game, in the platform selection section, select the retro game type

I, II, III, IV
Create a sequel to a game.
Available when one of the games reaches 70% of Game Review

Spin Off
Create a spin off.
Available when 50,000 copies of one of the games are sold

Better Than the Original?
Create a remaster of one of your games.


Game Porting Made Easy
Port a game to another platform.


World of Meridian
Create an MMO game.
Available since October 1993

Is the Game Really Free?
Create an F2P game.
Available since February 2003

Bonus Payment
Create a contract game.
This action helps to get the Publisher Relationship Achievement

Everyone Likes Snakes
Create a cell phone game.
Available since November 2007

Insert Coin!
Create a arcade machine.
Available from the moment the Workshop is built

Console War
Create your own stationary console.
Available from the moment the Console Development is built

This Fits in My Pocket
Create your own mobile console.
Available from the moment the Console Development is built

These achievements can be obtained on any difficulty level. Try to select the optimal parameters of the game, match the trends and supplement the game with various improvements.

Marble Maze
Create an skill game with a rating of at least 70%.
Genre available since January 1976

Dr. Lario
Create an puzzle Game with a rating of at least 70%.
Genre available since January 1976

The Island of Monkeys
Create an adventure game with a rating of at least 70%.
Genre available since January 1976

The Test Drivers
Create an racing game with a rating of at least 70%.
Genre available since January 1976

Dungeons and Masters
Create an RPG Game with a rating of at least 70%.
Genre available since May 1977

The Civilizations
Create an strategy game with a rating of at least 70%.
Genre available since July 1978

Hurrican
Create an action game with a rating of at least 70%.
Genre available since August 1979

Super Lario World
Create an platformer with a rating of at least 70%.
Genre available since October 1980

Spaceship: Elite
Create an simulation game with a rating of at least 70%.
Genre available since Dec 1981

California Cup
Create an sports game with a rating of at least 70%.
Genre available since January 1982

Mad Oil Tycoon
Create an economic simulation with a rating of at least 70%.
Genre available since February 1983

Backstreet Fighter
Create an fighting game with a rating of at least 70%.
Genre available since April 1984

Day Zombie
Create an survival game with a rating of at least 70%.
Genre available since April 1986

Simulation City: 1602
Create an building game with a rating of at least 70%.
Genre available since November 1988

Dragon's Cave
Create an interactive movie with a rating of at least 70%.
Genre available since February 1990

Commander Yuri
Create an Real-Time strategy game with a rating of at least 70%.
Genre available since June 1991

BOOM
Create an First-Person Shooter.
Genre available since July 1991

Better Than a Book
Create an visual novel with a rating of at least 70%.
Genre available since June 1992

Max Brain
Create an Third-Person Shooter with a rating of at least 70%.
Genre available since August 1996

80%
One of your games must receive an overall rating of at least 80%.


90%
One of your games must receive an overall rating of at least 90%.


100%
One of your games must receive an overall rating of at least 100%. [Difficulty: Legendary]
When creating a game, make sure the difficulty level is "Legendary"

Publishing will be available from the moment the Production is built

Now I Will Become Rich
Produce and distribute a game without a publisher.


Discount
Publish a budget game.


Complete Edition
Publish an addon game bundle.
You need to create a game and Addons to it.

Bundles
Create a game bundle.
Several Budget Games need to be published.

Publisher!
Publish a game from an NPC company.


My Best Friend!
Maximize the relationship with a publisher.
Publish games through only one publisher, fulfill their game contracts and get the achievement

Contractors
Sign an exclusive contract with a publisher.


That Was a Lot of Jobs!
Achieve a reputation with clients of 100%.
Complete all contract assignments on time

Shopping Tour I
Buy an NPC developer or publisher.


Shopping Tour II
Buy at least 10 NPC developers or publishers.


Shopping Tour III
Buy at least 30 NPC developers or publishers. [Difficulty: Legendary]
When creating a game, the difficulty must be "Legendary" and the number of competitors must be more than 30

Only single player games, budget games, GOTY games, add-on bundles, and game bundles are eligible for game sales achievements.

Gold
Sell at least 1,000,000 units of a game.
Get the "Golden Disc" decoration

Platin
Sell at least 10,000,000 units of a game.
Get the "Platinum Disc" decoration

Diamond
Sell at least 50,000,000 units of a game. [Difficulty: Legendary]
Get the "Diamond Disc" decoration. When creating a game, make sure the difficulty level is "Legendary". I got this achievement when I released a set of addons for one of the franchise's high popularity games during a period of high sales.

To increase sales of the console, you need to reduce its cost and release a lot of games for it. Portable consoles outsold stationary consoles. To do this, I set a large support budget (1 billion) for all types of games, reduced the cost of production, bought several developers who only released exclusives for my consoles.

Console war II
Sell at least 10,000,000 units of your own console.
Any type of console

Market Leader
Sell at least 50,000,000 units of your own console. [Difficulty: Legendary]
Any type of console. When creating a game, make sure the difficulty level is "Legendary".

Pocket Money
Have at least $50,000,000.


That Is Not Enough!
Have at least $500,000,000.


Three Commas Club
Have at least a billion dollars. [Difficulty: Legendary]
When creating a game, make sure the difficulty level is "Legendary"

Intellectual Property
Maximize the popularity of an IP.
Release games, add-ons, etc. with a high review rating for only one franchise

Legendary Game Company
Maximize your studio reputation. [Difficulty: Legendary]
When creating a game, make sure the difficulty level is "Legendary". Always release games with high ratings.

The following rewards are given out at the Mad Games Awards each year on the 1st week of December

This Can't Be Right!
One of your games must be voted the worst game of the year.
When creating a game, choose the worst settings

Trendsetter
One of your games should set a new trend.
It is necessary to create a game with a high rating and a new combination of genres. It's easier to do at the beginning of the game.

Publisher of the Year
Win the Publisher of the Year award.
Only publish games with a high review score

Eye Candy
One of your games must get an award for the best graphics.
Invest in graphics in games

A Great Soundtrack
One of your games must get an award for the best sound.
Invest in sounds in games

Game of the Year
One of your games must be awarded Game of the Year.
Only develop games with a high review score

Developer of the Year
Win the Developer of the Year award.
Develop many games with a high level of review

Everyone Loves Me!
Have at least 1,000,000 fans.
To increase the number of fans, you need to release popular games in different genres, receive awards and participate in the Mad Games Convention, which takes place every year on the 1st week of July

Overhype!
Create an overhype for one of your games.
When developing (precisely during development) a game, add-on, etc. for a popular franchise, it is necessary to select a special type of Overhype marketing in the marketing department. If everything goes well, then the level of hype will rise to 200 and you will receive an achievement.

Employer I
Have at least 20 employees.


Employer II
Have at least 50 employees.


Employer III
Have at least 100 employees.


My Name Is Sid Maier
Hire a developer legend.


Masterful
Have an employee with an experience of 100% at any skill.
Train one of the employees to skill level 90 and wait - the employee will eventually reach skill level 100, as additional training occurs in the process

This Is the Future!
Reach the year 2050 in the game.


I Don't Like to Be Alone
Start a multiplayer game with at least one friend.
Based on the description, this achievement can be obtained in conjunction with the following.

This Is My Team!
Start a multiplayer game with four friends.

If you want, you can praise me in my platinum list Eligor's Platinum, which I am trying to complete :)
All the best :)