Mighty Jill Off is a 2008 independently developed freeware platform video game designed by Anna Anthropy, with art by James Harvey and music by Andrew Toups.

It stars a submissive named Jill, who has a boot fetish and is forced to climb up a tower after her Queen kicks her down it as punishment.

Mighty Jill Off has received praise for its BDSM themes from critics of websites such as Rock, Paper, Shotgun and Game Set Watch.

In the air, players may cause Jill to slowly descend by rapidly pushing the jump button while pointing in the direction that they want her to go.

[3] Coming into contact with these obstacles kills Jill instantly, forcing her to start at the most recent checkpoint—typically located at a change in room.

Harvey was initially wary of doing work that was BDSM-themed; he felt that it was easy for something that is both cartoony and sexual to make viewers feel uncomfortable and used the Japanese harem anime genre as an example.

He also cited as inspiration specific Japanese cartoonists who he felt had successfully portrayed sex in animation such as Monkey Punch, the creator of Lupin III.

[9] He attempted to design the title screen's background to "emphasise the drama of [the] situation, or to expressionistically [sic] symbolise the characters in the scene".

However, there were some hurdles; he originally envisioned the Queen's tower to be a smooth, straight one, but felt that it would be too phallic, which would be meaningless symbolism given the game's content.

[9] Anthropy and Harvey held a contest for people to contribute fan art for the game; the five winners won hand-made Mighty Jill Off activity books, which included activities such as creating make-out partners for a group of "repulsive, tongue-waggling oafs", as well as writing a poem for the game's Queen.

[7] Anthropy told Harvey that she preferred characters with more realistic proportions; as a result, he ended up with a design that was three and a half heads tall.

Due to her submissive position, he designed her to be an "innocent" who looked "eager-to-please", with "benign, wide eyed facial expressions".

Clearing this level shows Jill being gagged and bound to a large X-cross and being whipped once for each minute she took to reach the top again.

[18] Bitmob's James DeRosa called it "tough-as-s***" and gave credit to Anthropy for coining the genre "masocore".

[2] Rock Paper Shotgun's Alec Meer described it as a "wry, subversive examination of why video game protagonists put themselves through a torturous amount of struggle to reach their objectives".

[20] James DeRosa praised Anthropy for her implementation of elements and ideas that most games do not cover and called it a "hypersexualized, bondage-themed platformer" with which Anthropy "explores the power dynamics of sexuality and disassembles essentialist male and female sex roles as portrayed in video games -- as well as the significance of difficulty and reward as a design method".