==External Links==
* [http://www.blackfalcongames.net/?p=159#Hopper Black Falcon Games: Hopper]
* [https://www.everygamegoing.com/landingThing/index/machine_type_group_default_folder/ti99_4a/ills_folder/texas_instruments/format_folder/rom_carts/item_title/Hopper/ Every Game Going: Hopper (TI99/4A)]
* [https://gamefaqs.gamespot.com/ti99/947239-hopper GameFAQs: Hopper (TI-99/4A)]
* [http://www.mobygames.com/game/ti-994a/hopper___/ Moby Games: Hopper (TI-99/4A)]
* [https://pixelpedant.com/items/show/112 Pixelpendant's Texas Instrument's Manual Compendium: I'm Hiding]
* [https://www.videogamehouse.net/gamemain/cartsil/imhiding/ TI-99/4A Video Game House: I'm Hiding]
