Japanese gaming giant SEGA is expanding into blockchain gaming with a new offering on the Oasys Layer-2 blockchain network. Double jump.tokyo announced that it is working on the newest installment in the Sangokushi Taisen series—this time in the form of a blockchain game. the Sangokushi Taisen series is based on the classic 14th-century Chinese novel ‘Romance of the Three Kingdoms’ by Luo Guanzhong.