Best aliens games on Steam

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Shadowgrounds
Shadowgrounds
Price -78% 1.12€
Rating 7.8
Release 08 May 2006
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Earth 2160
Earth 2160
Price 9.75€
Rating 6.8
Release 01 Apr 2006
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Half-Life 2
Half-Life 2
Price Free to play
Rating 9.6
Release 16 Nov 2004
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Half-Life: Source
Half-Life: Source
Price 9.75€
Rating 6.8
Release 01 Jun 2004
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Half-Life: Blue Shift
Half-Life: Blue Shift
Price -85% 0.74€
Rating 9.0
Release 01 Jun 2001
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Half-Life: Opposing Force
Half-Life: Opposing Force
Price -85% 0.74€
Rating 9.3
Release 01 Nov 1999
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Half-Life
Half-Life
Price -90% 0.81€
Rating 9.5
Release 08 Nov 1998
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All ratings 7 or more 8 or more 9 or more
All prices Less than 30€ Less than 20€ Less than 10€ Less than 5€ Less than 1€ Free to play