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开发商在 Steam 发布的官方公告：修补档、新内容与活动，依时间整理。点标题看完整内容。
2022 年 12 月
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12/9五📢 公告Portal with RTX is Now Available
Portal with RTX is now available, and it’s free for anyone who owns Portal! To play, you’ll need to go here to add it your library. Developed by NVIDIA Lightspeed Studios, Portal with RTX completely r…
数据源：Steam 官方公告（每 6～24 小时更新）。标题与摘要版权属于原开发商。