games: added league of legends entry

wiki/games/league_of_legends.md

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+# League of Legends
+
+[League of Legends](https://www.leagueoflegends.com/en-us) is a multiplayer
+online battle arena game which is available as a standalone Launcher for
+[Windows](/wiki/windows/windows.md).
+It is developed and published by [Riot Games](https://www.riotgames.com/en).
+
+## Setup
+
+League of Legends is available to download for
+[Windows](/wiki/windows/windows.md) systems on
+[the official website](https://signup.leagueoflegends.com/en-us/signup/index#/).
+
+For [Linux](/wiki/linux/linux.md) distributions [Lutris](/wiki/games/lutris.md)
+and [WINE](/wiki/linux/wine.md) can be used to run the game.
+The correct version can be downloaded using the
+[Lutris website](https://lutris.net/games/league-of-legends/).
+It is recommended that a custom version of [WINE GE](/wiki/linux/wine.md) is
+used named `Lutris-GE` which can be found on
+[the Github page of WINE-GE-custom](https://github.com/GloriousEggroll/wine-ge-custom/releases?q=lol&expanded=true).
+It is important to set up the game correctly for anti-cheat to work properly.
+By checking the right box at the launch of the games the anti-cheat can be
+enabled to persist through reboots on most Linux distributions.
+For [Arch Linux](/wiki/linux/arch-linux/arch-linux.md) this has to be done
+manually as explained by
+[QuinnBorn on Reddit](https://www.reddit.com/r/leagueoflinux/comments/eokiir/anticheat_popup_every_reboot/).
+For that the file `/etc/sysctl.d/vsyscall.conf` has to be created with the
+contents `abi.vsyscall32 = 0`.