List of Drillimation knockoffs acknowledged by Drillimation

Like with most media franchises, The Drillimation Series is subject to many knockoffs and bootlegs. While many counterfeit machines and games are made, many of these have come to the attention of Drillimation Studios themselves. Many of these unlicensed, unofficial, or counterfeit products have been shut down, removed from sale, or subject to legal action under Digital Millenium Copyright Act (DMCA) complaints by Drillimation Studios facilities across the globe.

Lucky Star: Reloaded and Remastered
In 2011, in honor of the 30th anniversary of the franchise, developers from Purdue University in West Lafayette, Indiana created a 3D voxel version of the original 1987 Lucky Star. It was playable in the player's browser via the power of JavaScript and WebGL. A few days later, the game was pulled from Purdue's website due to a DMCA complaint made by Drillimation Studios, saying that "the game copies the assets of the original game and allows players to play an unauthorized copy of the game".

Mr. Driller Drill Spirits HD
In the summer of 2015, an independent game developer from Seattle, Washington recreated the first stage of Mr. Driller Drill Spirits (known as Mr. Driller 64 on the N64) in HD using the Unity game engine. It was playable in the player's browser via the power of HTML5 and WebGL. It didn't last long when Drillimation Studios sent a cease and desist letter to CloudFlare, the hosting provider of the game. It didn't take too long for the game to be pulled offline.

Touhou Kireiyoru: Fantasy Night

 * Main Article: Drillimation Studios v. PoQoP

Touhou Kireiyoru: Fantasy Night is a fan-made Touhou Project game developed and published by PoQoP exclusively for iOS devices. The game was created under Drillimation's Content Usage Rules and released in April 2011. Although the contract says that original art styles must be used, PoQoP decided to break the agreement by using the assets from Touhou 8: Imperishable Night and other fanmade assets. As a result, Drillimation terminated the contract and sued PoQoP for piracy and copyright infringement. At one point after the lawsuit, the game was removed from the App Store. As of December 2011, the game returned to the App Store following a counter-notice sent by Apple.

Touhou Pangaea: The Insanity
Touhou Pangaea: The Insanity is a series of very difficult stages and bosses of the Driller Engine 2 Era made by YouTuber PangaeaPanga from Rocky Hill, Connecticut, all of which he made through a ROM hack of Touhou 7: Perfect Cherry Blossom. The whole game took him around a year to make and beat, and even hosted the ROM on his website. In September 2015, the ROM was removed from his website due to a DMCA complaint made by Nintendo regarding his hacked Super Mario World levels, as well as Touhou Pangaea: The Insanity. The takedown eventually lead to Alex Tan v. Drillimation Studios California, where game publishers need to consider fair use before allowing ROM hacks of Drillimation games to be made.

Touhou Reiiden: Highly Responsive to Prayers Lunatic Edition
In 2008, a group of students from Commack High School in Long Island, New York began working on a massive remake of the 1986 game Touhou Reiiden: Highly Responsive to Prayers. The remake included 25 levels per world, Marisa Kirisame, Sakuya Izayoi, and Sanae Kochiya being playable, and some new soundtracks. The game took four years to complete. Drillimation Studios didn't agree about this. Not only did they send a cease and desist letter, they also said that "the game is way too long to beat and is too difficult". Surprisingly, Team Shanghai Alice was doing a remake to the game but was canceled before it was released.

Konata x Yutaka Yuri Fanfiction
In 1997, an erotic fanfiction featuring characters from Lucky Star came to the attention of Drillimation when several anime-themed fansites were hacked from a virus named Tsukasa, replacing front pages with this fanfic. The fanfic was also subject to controversy over its erotic content, despite that Drillimation was a family-friendly game developer. The fanfic has also been used by spam bots on wiki-related websites, although many versions of this hack have been patched.