LÖVE vs O3DE (previously Lumberyard)

The LÖVE forums are extremely helpful. With people checking the forums every day, it won't take long to receive answer to your questions on the Support board, receive feedback on games you post in the Projects board, as well as have a chat about the LÖVE engine while learning tricks to use in the very active General board.

If you need an immediate answer though, or just want to chat, there is a very active and helpful IRC channel.

Lua is an embeddable scripting language designed to be lightweight, fast yet powerful. It is used in major titles such as Civilization as well as a lot of indie games.

Lua is very popular because it provides "meta language" features. You can implement object-oriented structures, or pure procedural functions, etc. It has a very simple C interface, and gives the engine developer a lot of flexibility in the language itself.

Artists tend to love Lua too because it's very approachable, with plain and forgiving syntax.

Lua is free open-source software, distributed under a very liberal license (the well-known MIT license).

Lua2D handles loading the resources, reading input, playing sounds and displaying stuff on the screen. Only the logic is left for the developer to write. It also removes the overhead of having to use and learn a GUI game editor. All you need is a knowledge of Lua and your favourite text editor or IDE.

Supports Windows, Mac OS X, Linux, Android and iOS.

The LÖVE engine is licensed under The zlib/libpng License (which is very short and human readable) which allows you to use the source code and even modify it as long as you do not claim that the original source code is yours.

You can obtain the code at this bitbucket repository and even help fix bugs and participate in the development of LÖVE.

There are plenty of open source examples of games or components built by the community that are ready to use or learn from.

The LÖVE wiki provides full documentation of its easy to use Modules, which are conveniently located on the side bar of the wiki. It only takes seconds to find the module for love.keyboard, which provided a list of all functions along with arguments and examples where the function could be used.

You can learn the basics very quickly and start making simple games in no time, even if you have no previous Lua knowledge. If you're a little experienced with LÖVE, you can prototype a 2D game with it in no time.

It is possible to develop games directly on a tablet or cellphone with the Android system by using the experimental Android branch.

That is a great tool for teaching novice programmers. Creating a game on LÖVE, you have to think about developing, not about the syntax of the language.

Has several tutorials in several languages on the internet, mainly on Youtube.

Because all professionals in gamedev use C++, and Lua the fastest scripting lang.

So much love.

As a proof of how much Amazon is committed to the project.

Advenced stereoscopic reprojection to save rendering time.

Sculpting and painting tools for terrain and instanced details.
Procedural generation of terrain.

Built-in support for roads and rivers to ease the design of rich game environments.

Full source code for Engine Editor and every tool.

Thanks to built-in terrain, time of day, ocean and volumetric fog systems. There is also a gfx pack with various environmental meshes, cloud, particles, materials and skyboxes.

Multiple entity contexts, reflection, serialization, replication, script binding, event bus (EBus) messaging, fully cascading prefabs (slices).
Every reflected property can be fully exposed in the editor with a customizable gui control and can be animated in the built in animation tools.

Online oriented plugins composed by both client, server and administration components to easily add various online capabilities without further work (es leaderboards, login, message of the day, downloadable contents).
Since version 1.7 they has been released at a steady rate.

Very advanced 3D prototyping tool with many modeling features and UV mapping support available. If you want you can build any kind of fully textured static mesh without relying on external tools.

Realistic looking lighting bounces.
It doesn't require long offline precomputation times like other static and dynamic GI solutions based on lightmaps or other similar techniques.

Other than common aws functionality it supports game specific Game Lift for autoscaling game servers.

Modular workflow and flexible cascaded propagation of changes.

To easy add and remove modular functionalities to a project and easy share them.
Modules are called Gems and can contain code and/or assets.

Tessellation and Displacement.
Various Parallax Mapping techniques(POM siluette).
Translucency and Sub surface scattering.
Detail Mapping.
Material Blending.
Emission.
Advanced uv transformation and animation.

Global environmental volumetric fog and/or hand placed custom shaped volumes with featuring full lighting and shadows.

Amazon made available a selection of triple A quality scenes filled with high quality assets.

Implements the most recent technique available (published in 2017) from Anton Kaplanyan.

You can modify shaders while testing the game.

Shader files are modular and annotated to setup the material editing gui and filter out mutually exclusive options. All shader permutation are compiled almost instantly from the asset processor and cached for later use.

You can create games that react to keywords entered in a designated Twitch channel and let streamers to invite targeted viewers into their game sessions on demand with ease.

It is still possible to use the non LTX version with few changes.

Built-in Lua editor with remote debugger to debug Lua scripts running in any device.

Optimized versions of assets can be streamed live to any device connected over the network.
This makes possible to implement asset types that hot reloads reducing drastically the time to test new content and little changes on device.

Multiple grain of control over any kind of engine setting and various kind of Lod systems. Settings can be grouped and applied in batch.

Perforce also comes with a free version for a limited number of team members.

Has skin shaders with subsurface scattering and weighted wrinkle maps, eye shaders with refraction parallax, hair with anysotropic specular reflections, etc.

A must for problematic things like hair , vegetation and scenes with complex solid transparent objects(es glass of water with ice cubes).

Special iteration of Temporal AA to battle the ghosting issue omnipresent in engines using other Temporal AA techniques.

It now works for both static models and animations and support advanced setups(es lods and physics).

Updated renderer pipeline to leverage the full spectrum of precision, luminosity and image processing features of the latest HDR tv.

Animation Spline editor supporting huge range of keyframing and tangent editing tools.

The UI uses the entity component system so it's fully modular and easily expandable. The UI is easily skinnable and supports border scaling images (scale 9). Powerful layouting system supporting multiple screen resolutions. Being based on the entity system every property can be fully animated.

It is elegantly managed in a separate entity context so it doesn't get messed up with other kind of entities and their components like in other engines, but it's fully decoupled communicating with entities in other context on specific event buses.

See here.