A List of Easy To Use Game Engines And Tools

This is a list of game engines that are easy to use and also for professionals.

This list includes retro FPS for any hobbyist.

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RETRO GAMES This is the only 2.5D engine on this list.It powered Doom and Doom 2.It was better than Wolfenstein 3D as it could use walls of different heights.It was packed in .wad files and modern source ports can use .pk3 as well.
 * Doom (iD Tech 1)

ZDoom is a well know source port.Unfortunately it was stopped last year but it is still used.However updates ure being posted for GZDoom.

Zandronum is based on Skulltag,which was a famous multiplayer source port.It is basically Skulltag reborn.

Doom Builder (Map Editor)

Slade 3 Quake was a revolutionary game which introduced 3D environments.It was very popular and it still is.
 * Quake (iD Tech 2)

This is a thread Chase Martin made with the name ijazz on quakeone.com

It contains links to some of the best engines for Quake.Customization is very complex though for some source ports/engines,so be warned.

My thread

Trenchbroom (great for newbies but hard to make curved surfaces)

J.A.C.K (Formerly Jackhammer and available on Steam) This was based on Quake but had better features.It had its own development kit (SDK 2.3 was the last after which the more modern Source engine debuted with Counter Strike:Source)
 * Half-Life (Valve GoldSrc)

It has many great mods.

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MODERN ENGINES Source is a 3D video game engine developed by Valve Corporation as the successor of GoldSrc. It debuted with Counter-Strike: Source in June 2004, followed shortly by Half-Life 2, and has been in active development since.
 * Source

[https://developer.valvesoftware.com/wiki/Main_Page. Here you go,boys!]

The latest version is Source 2 which was introduced in a beta update for Dota 2 called Reborn. It is an engine from Epic Games.It is the least newbie-friendly but it is VERY powerful.
 * Unreal Engine 4

-- IN PROGRESS--