旧作 放置生贄系RPGゲーム ソウルクリスタル is a free role-playing game developed by Taiyo Project. The game is available on Android and is a predecessor to "放置＆ハクスラ系RPG ソウルクリスタル." In this game, you play as the protagonist who must obtain the legendary gem "Soul Crystal." The game is an idle RPG that allows you to progress easily with simple controls and a party system. You can hire companions and select the dungeon you want to conquer, and your party will automatically progress through it. The game is highly addictive and has a high level of replayability. You can choose from various classes and combine them to create the strongest party to defeat any monster. The game has over 250 items to collect, including weapons and legendary items. The unique "Sacrifice Function" allows you to gain powerful weapons and unlock hidden dungeons by sacrificing your companions.