OSRS Hiscores icons, copyright Jagex Ltd.
Source: https://secure.runescape.com/m=hiscore_oldschool/overall
Downloaded once for bundled offline display.
https://www.runescape.com/img/rsp777/game_icon_chambersofxeric.png
https://www.runescape.com/img/rsp777/game_icon_maggotking.png
https://www.runescape.com/img/rsp777/game_icon_phantommuspah.png
https://www.runescape.com/img/rsp777/game_icon_theatreofblood.png
https://www.runescape.com/img/rsp777/game_icon_thefracturedarchive.png
https://www.runescape.com/img/rsp777/game_icon_tombsofamascut.png
https://www.runescape.com/img/rsp777/game_icon_zulrah.png

Boss search icons:
https://www.runescape.com/img/rsp777/game_icon_abyssalsire.png
https://www.runescape.com/img/rsp777/game_icon_alchemicalhydra.png
https://www.runescape.com/img/rsp777/game_icon_amoxliatl.png
https://www.runescape.com/img/rsp777/game_icon_araxxor.png
https://www.runescape.com/img/rsp777/game_icon_artio.png
https://www.runescape.com/img/rsp777/game_icon_barrowschests.png
https://www.runescape.com/img/rsp777/game_icon_brutus.png
https://www.runescape.com/img/rsp777/game_icon_bryophyta.png
https://www.runescape.com/img/rsp777/game_icon_callisto.png
https://www.runescape.com/img/rsp777/game_icon_calvarion.png
https://www.runescape.com/img/rsp777/game_icon_cerberus.png
https://www.runescape.com/img/rsp777/game_icon_chambersofxeric.png
https://www.runescape.com/img/rsp777/game_icon_chambersofxericchallengemode.png
https://www.runescape.com/img/rsp777/game_icon_chaoselemental.png
https://www.runescape.com/img/rsp777/game_icon_chaosfanatic.png
https://www.runescape.com/img/rsp777/game_icon_commanderzilyana.png
https://www.runescape.com/img/rsp777/game_icon_corporealbeast.png
https://www.runescape.com/img/rsp777/game_icon_crazyarchaeologist.png
https://www.runescape.com/img/rsp777/game_icon_dagannothprime.png
https://www.runescape.com/img/rsp777/game_icon_dagannothrex.png
https://www.runescape.com/img/rsp777/game_icon_dagannothsupreme.png
https://www.runescape.com/img/rsp777/game_icon_derangedarchaeologist.png
https://www.runescape.com/img/rsp777/game_icon_doomofmokhaiotl.png
https://www.runescape.com/img/rsp777/game_icon_dukesucellus.png
https://www.runescape.com/img/rsp777/game_icon_generalgraardor.png
https://www.runescape.com/img/rsp777/game_icon_giantmole.png
https://www.runescape.com/img/rsp777/game_icon_grotesqueguardians.png
https://www.runescape.com/img/rsp777/game_icon_hespori.png
https://www.runescape.com/img/rsp777/game_icon_kalphitequeen.png
https://www.runescape.com/img/rsp777/game_icon_kingblackdragon.png
https://www.runescape.com/img/rsp777/game_icon_kraken.png
https://www.runescape.com/img/rsp777/game_icon_kreearra.png
https://www.runescape.com/img/rsp777/game_icon_kriltsutsaroth.png
https://www.runescape.com/img/rsp777/game_icon_lunarchests.png
https://www.runescape.com/img/rsp777/game_icon_madangel.png
https://www.runescape.com/img/rsp777/game_icon_maggotking.png
https://www.runescape.com/img/rsp777/game_icon_mimic.png
https://www.runescape.com/img/rsp777/game_icon_nex.png
https://www.runescape.com/img/rsp777/game_icon_nightmare.png
https://www.runescape.com/img/rsp777/game_icon_obor.png
https://www.runescape.com/img/rsp777/game_icon_phantommuspah.png
https://www.runescape.com/img/rsp777/game_icon_phosanisnightmare.png
https://www.runescape.com/img/rsp777/game_icon_sarachnis.png
https://www.runescape.com/img/rsp777/game_icon_scorpia.png
https://www.runescape.com/img/rsp777/game_icon_scurrius.png
https://www.runescape.com/img/rsp777/game_icon_shellbanegryphon.png
https://www.runescape.com/img/rsp777/game_icon_skotizo.png
https://www.runescape.com/img/rsp777/game_icon_solheredit.png
https://www.runescape.com/img/rsp777/game_icon_spindel.png
https://www.runescape.com/img/rsp777/game_icon_tempoross.png
https://www.runescape.com/img/rsp777/game_icon_theatreofblood.png
https://www.runescape.com/img/rsp777/game_icon_theatreofbloodhardmode.png
https://www.runescape.com/img/rsp777/game_icon_thecorruptedgauntlet.png
https://www.runescape.com/img/rsp777/game_icon_thefracturedarchive.png
https://www.runescape.com/img/rsp777/game_icon_thegauntlet.png
https://www.runescape.com/img/rsp777/game_icon_thehueycoatl.png
https://www.runescape.com/img/rsp777/game_icon_theleviathan.png
https://www.runescape.com/img/rsp777/game_icon_thermonuclearsmokedevil.png
https://www.runescape.com/img/rsp777/game_icon_theroyaltitans.png
https://www.runescape.com/img/rsp777/game_icon_thewhisperer.png
https://www.runescape.com/img/rsp777/game_icon_tombsofamascut.png
https://www.runescape.com/img/rsp777/game_icon_tombsofamascutexpertmode.png
https://www.runescape.com/img/rsp777/game_icon_tzkalzuk.png
https://www.runescape.com/img/rsp777/game_icon_tztokjad.png
https://www.runescape.com/img/rsp777/game_icon_vardorvis.png
https://www.runescape.com/img/rsp777/game_icon_venenatis.png
https://www.runescape.com/img/rsp777/game_icon_vetion.png
https://www.runescape.com/img/rsp777/game_icon_vorkath.png
https://www.runescape.com/img/rsp777/game_icon_wintertodt.png
https://www.runescape.com/img/rsp777/game_icon_yama.png
https://www.runescape.com/img/rsp777/game_icon_zalcano.png
https://www.runescape.com/img/rsp777/game_icon_zulrah.png