Unofficial software, created by both hobbyists and experienced developers, is called Homebrew. Although it applies to any kind of computer program, in the field of video games this is a practice that brings together no lesser number of followers.
Currently, it is possible to find on the web some copies of games created for a console or platform of yesteryear, discontinued in most cases. Here are some examples.
This platform game is based on the dynamics of jumping and running. The story centers on Hermes, a cook who chases one of his chickens to cook it. Considering that this is considered a sensitive topic today, its developers warn that the game features pixel violence and promotes the consumption of meat.
It is available for a large number of classic computers and consoles from different eras. Among them are Amiga OS4, Nintendo GameCube, PlayStation 2, Classic, Portable and Vita, along with many other platforms.
Super Tilt Bro.
Rescuing the spirit of Super Smash Bros, that famous game that began its saga in 1999, with an edition for Nintendo 64, this proposal emerged for the Nintendo Entertainment System (NES / Famicom).
For those who do not know this game, it is an example that escapes the dynamics of traditional fighting games, because instead of physically weakening them, the objective is to expel them from a platform (playing arena).
Link: Super Tilt Bro.
This action and platform game focuses on the character of Olivia Gun. The narrated story tells of an attack that the protagonist was the victim of, over which she seeks to vindicate herself by recovering her video game console, which is part of what she lost.
It has 20 levels, 4 “bosses” (levels with powerful enemy) and can be downloaded as ROM for Sega Master System.
Link: Galactic Revenge
This game has a graphic treatment worthy of games with aesthetics pixel art that today circulate more frequently on the Internet.
Available for Super Nintendo, this independent game presents us with a character in a dark maze, which he must go through in search of his exit. It is still in development, but the shared trailers are remarkable and playable now.
If the concept of “classic console” evokes something older, this might interest you. It is a fighting game, in its most basic presentation, but created for the Atari 2600.
Available in two different editions (one with the jumping option enabled and the other not), this game has three levels, which must be played between two people, as it does not have the mode to play against the computer.
This list is presented by way of introduction. The alternatives that can be found on the web are much broader, contemplating a more open spectrum of consoles that have an unofficial extension of their game catalog, in the hands of a whole community of amateur and professional developers.
Depending on the support under which these games are run, some can even be found in physical editions, as is the case with The Last Super, which in addition to being offered as a downloadable ROM, is also available as a cartridge for SNES.