Nestor2409 said:

Can I know how much lines there is in the source code of a game such has League of Legends?

Nobody would know unless they've worked on the game. Games can range from thousands to hundreds of thousands of lines of code and even more depending on the scope of the game, the language used along with the tools, and even the skill level of the programmers involved.

Nestor2409 said:
And what software they use for the design?

Riot Games uses their own in house engine. Lima Beans on their forums confirmed the following back in 2009:

"

we use at least the following languages here
C++ (the core game is written in this)
Lua (core game)
C# (game tools)
ActionScript (game hud and pvp.net)
Java (platform servers)
Erlang (platform servers)
Php/sql (web team / platform)

"

Ref: https://web.archive.org/web/20200314191817/http://forums.na.leagueoflegends.com/board/showthread.php?t=16318&page=1​

If something has changed since I wouldn't know.

Nestor2409 said:

@undefined For the design of the charactets?

Outside of concepting, the characters are 3D models which have hand painted (using a tablet) textures on them. This could be done in any application that allows polygon modeling, and texture painting. There is also a mix of zBrush for sculpting as seen in their video: https://www.youtube.com/watch?v=osnTFCm1hlc

https://technology.riotgames.com/news/trip-down-lol-graphics-pipeline​

As I don't work there I can assume they use Autodesk's products for 3D modeling and animation, and maybe something else for the VFX (spells and such). They also use zBrush as well. I do recall seeing 3DS Max in one of their videos.

It really doesn't make a difference because there are lots of tools out there that can produce such results.

Nestor2409 said:

@undefined but about how many lines?

What is the reason you're asking for the line count of the source code?