Retro-style 2D scrolling platform shooter

davegnukem

Retro-style 2D scrolling platform shooter

Dave Gnukem is an open source retro-style 2D scrolling platform shooter, inspired by and similar to Duke Nukem 1. It currently runs on Windows, macOS, Linux and various other platforms. It is written in C++ using SDL library and it features an integrated level editor as well. This game is not really a clone or remake, it is probably most akin to a parody.
Valve's Steam digital software delivery system

steam-installer

Valve's Steam digital software delivery system

Steam (https://www.steampowered.com) is a software content delivery system developed by Valve software (https://www.valvesoftware.com). There is some free software available, but for the most part the content delivered is non-free.
multi-system chiptune tracker compatible with DefleMask modules

furnace

multi-system chiptune tracker compatible with DefleMask modules

This is a chiptune tracker compatible with DefleMask modules (.dmf). It supports the following systems: - Sega Genesis - Sega Master System - Game Boy - PC Engine - NES - Commodore 64 - Yamaha YM2151 (plus PCM) - Neo Geo - AY-3-8910 (ZX Spectrum, Atari ST, etc.) - Microchip AY8930 - Philips SAA1099 - Amiga - TIA (Atari 2600/7800)
Multiplayer infinite-world block sandbox

luanti

Multiplayer infinite-world block sandbox

Luanti is a Minecraft-inspired game written from scratch and licensed under the LGPL (version 2.1 or later). It supports both survival and creative modes along with multiplayer support, dynamic lighting, and an "infinite" map generator.