Shrak is an unofficial total conversion mod developed for id Software

Id Software

Id Software is an American video game development company with its headquarters in Richardson, Texas. The company was founded in 1991 by four members of the computer company Softdisk: programmers John Carmack and John Romero, game designer Tom Hall, and artist Adrian Carmack...

's Quake by Quantum Axcess

Quantum Axcess

Quantum Axcess was a software publishing firm based in Columbus, Ohio. They published value-priced games and educational software. Their two biggest titles were total conversion mods for the popular game Quake, named Shrak and Malice. Quantum Axcess never fully met their financial obligations in...

.

Shrak's environments tend to be more abandoned-looking than Quake's, with a greater emphasis on post-apocalyptic themes and puzzles. The provided Red Book Audio

Red Book (audio CD standard)

Red Book is the standard for audio CDs . It is named after one of the Rainbow Books, a series of books that contain the technical specifications for all CD and CD-ROM formats.The first edition of the Red Book was released in 1980 by Philips and Sony; it was adopted by the Digital Audio Disc...

 soundtrack is ambient electronica

Electronica

Electronica includes a wide range of contemporary electronic music designed for a wide range of uses, including foreground listening, some forms of dancing, and background music for other activities; however, unlike electronic dance music, it is not specifically made for dancing...

 by Bonetribe. It shipped with Capture the Flag, Deathmatch

Deathmatch (gaming)

Deathmatch or Player vs All is a widely-used gameplay mode integrated into many shooter and real-time strategy computer games...

, and Bugwar game modes, the latter of which allows the player to compete in teams of either scorpions or spiders.