Editing Hovertank One (section)

==Development==
[[John Carmack]]'s research in the game's engine took six weeks, two weeks longer than any id engine before it. The engine written for this game was expanded upon with [[texture mapping]] to make ''[[Catacomb 3-D]]'', and then later ''[[Wolfenstein 3D]]''. Following the engine's completion, the id staff decided on the nuclear war theme and developed the game. [[Adrian Carmack]] enjoyed drawing the monsters and other ghoulish touches.<ref name="mastersdoom"/> The credits are John Carmack and [[John Romero]] as [[programmer]]s, [[Tom Hall]] as [[game design]]er and Adrian Carmack as [[video game artist]].

The [[source code]] to the game, owned by [[Flat Rock Software]], was released in June 2014 under [[GNU General Public License|GNU GPL-2.0-or-later]] in a manner similar [[John Carmack#Open-source software|to those done]] by id and partners.<ref>{{cite web|url=https://www.phoronix.com/scan.php?page=news_item&px=MTcxMjM |title=id Software's Softdisk Open-Sources Some Really Old Games |first=Michael |last=Larabel |date=June 6, 2014 |access-date=June 6, 2014 |publisher=[[Phoronix]]}}</ref>