Because I don’t know any other platforms

The Greatest Estate Developer

Eleceed (webtoon)
Special civil servent (webtoon)
Debut or die
Omniscient reader's viewpoint (webtoon)
Trash of the counts family
Return of the Flowery Mountain Sect (webtoon)
Return of the crazy demon (webtoon)

Most of these are on webtoon as listed so if u can I suggest you read it there cause they have better translations and are free as well so show the author some luvv <33

None of them are completed, the novel of ORV is but except for the last 2 ones, they are all ongoing. They are good tho, really good

OMGG IM SO SORRY I DIDNT READ THE COMPLETED PART (╯'□')╯

These are all really good completed action/horror manhwa
https://www.mangago.me/read-manga/the_return_of_the_8th_class_magician/
https://www.mangago.me/read-manga/tomb_raider_king/
https://www.mangago.me/read-manga/promised_orchid/
https://www.mangago.me/read-manga/her_summon/
https://www.mangago.me/read-manga/noblesse/
https://www.mangago.me/read-manga/dreamcide/
https://www.mangago.me/read-manga/life_completely_ruined/
https://www.mangago.me/read-manga/dark_mortal/
https://www.mangago.me/read-manga/mosquito_war/
https://www.mangago.me/read-manga/gosu_the_master/
https://www.mangago.me/read-manga/nano_list/
https://www.mangago.me/read-manga/the_boxer/
https://www.mangago.me/read-manga/if_ai_rules_the_world/
https://www.mangago.me/read-manga/pigpen/
https://www.mangago.me/read-manga/medical_return/
https://www.mangago.me/read-manga/distant_sky/
https://www.mangago.me/read-manga/monster_child/
https://www.mangago.me/read-manga/white_blood/
https://www.mangago.me/read-manga/castle/
https://www.mangago.me/read-manga/mujang/
https://www.mangago.me/read-manga/again_my_life/
https://www.mangago.me/read-manga/terror_man/
https://www.mangago.me/read-manga/crimson_karma/
https://www.mangago.me/read-manga/delivery_knight/
https://www.mangago.me/read-manga/the_breaker/
https://www.mangago.me/read-manga/the_breaker_new_waves/
https://www.mangago.me/read-manga/the_first_hunter/
https://www.mangago.me/read-manga/the_god_of_high_school/
https://www.mangago.me/read-manga/shotgun_boy/
https://www.mangago.me/read-manga/no_scope/
https://www.mangago.me/read-manga/deor/
https://www.mangago.me/read-manga/dead_life/
https://www.mangago.me/read-manga/polarity/
https://www.mangago.me/read-manga/lessa/
https://www.mangago.me/read-manga/lessa_the_crimson_knight/
https://www.mangago.me/read-manga/lessa_servant_of_cosmos/
https://www.mangago.me/read-manga/the_story_of_a_low_rank_soldier_becoming_a_monarch/
https://www.mangago.me/read-manga/a_returner_s_magic_should_be_special/
https://www.mangago.me/read-manga/the_origin/
https://www.mangago.me/read-manga/please_have_a_meal/
https://www.mangago.me/read-manga/ygret/
https://www.mangago.me/read-manga/spirit_farmer/
https://www.mangago.me/read-manga/quest_supremacy/
https://www.mangago.me/read-manga/the_live/
https://www.mangago.me/read-manga/i_stole_the_number_one_ranker_s_soul/
https://www.mangago.me/read-manga/seoul_station_s_necromancer/
https://www.mangago.me/read-manga/zomgan/
https://www.mangago.me/read-manga/the_poisonous_healer/
https://www.mangago.me/read-manga/existence/
https://www.mangago.me/read-manga/barbarian_quest/
https://www.mangago.me/read-manga/i_shall_live_as_a_prince/
https://www.mangago.me/read-manga/legend_of_the_northern_blade/
https://www.mangago.me/read-manga/chronicles_of_heavenly_demon/
https://www.mangago.me/read-manga/kill_the_hero/
https://www.mangago.me/read-manga/devil_returns_to_school_days/
https://www.mangago.me/read-manga/superhuman_battlefield/
https://www.mangago.me/read-manga/villain_initialization/
https://www.mangago.me/read-manga/return_survival/
https://www.mangago.me/read-manga/dalsez/
https://www.mangago.me/read-manga/the_prince_of_myeolyeong/
https://www.mangago.me/read-manga/blood_and_butterflies/
https://www.mangago.me/read-manga/chasing_tails/
https://www.mangago.me/read-manga/an_uncomfortable_truth/
https://www.mangago.me/read-manga/suicide_notes_laid_on_the_table/
https://www.mangago.me/read-manga/dam_of_the_forest/
https://www.mangago.me/read-manga/the_planet_walks_alone/
https://www.mangago.me/read-manga/american_ghost_jack/
https://www.mangago.me/read-manga/bastard_hwang_youngchan/