Instructions to Import to your Google Calendar - https://support.google.com/calendar/answer/37118?hl=en (section: Advanced: Create or edit CSV). Data provided here is already in CSV format, you can copy to Notepad & save with CSV file extension and then import.
Subject,Start Date,Start Time A1 eSports League Austria Season 2 Playoffs - DIV vs TKA,2018,10,18,08,30,2018,10,18,08,30 A1 eSports League Austria Season 2 Playoffs - ALP vs TTW,2018,10,18,11,30,2018,10,18,11,30 A1 eSports League Austria Season 2 Playoffs - DIV vs ALP,2018,10,19,11,30,2018,10,19,11,30 A1 eSports League Austria Season 2 Playoffs - TKA vs TTW,2018,10,19,17,30,2018,10,19,17,30