Half-Life: Peaces Like Us

Half-Life: Peaces Like Us is a singleplayer modification for Half-Life, by Koumei Satou with a Xen setting.

Mankind found an entrance to XEN world. an investigation team met with the uncanny alien in that place. Then, mankind succeeded in becoming a friend with them. After that, a scientist team built a joint laboratory in the world of XEN. But, something bad there was approaching.....