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.

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.

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)