International Games System (TWO:3293) reported income before tax of NT$1.28 billion, or NT$4.55 per share, for May, according to a Monday Taiwan Exchange filing.
Shares gained about 2% in recent trade.
The gaming company's consolidated operating revenue amounted to NT$2.12 billion during the month.
Licensed games contributed the majority of revenue at 75%, followed by online games at 23% and arcade games at 2%