Demon's Regalia: Colosseum Achievements Here is the full list of all 8 Demon's Regalia: Colosseum achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply Down the hole.Complete one of the starting floors. You now have blood on your handsComplete one battle. 6 DaysMore than Five Nights... The GladiatorReach 20 days in the Colosseum. The ChampionReach 50 days (100 battles won) in the Colosseum. ... with this fish.Catch a fish. Ad Ab, welcome to the Advent... wait.Unlock the older of the Succubus sisters. One Big BoyUnlock the Big Gator.