Is crysis a steam game?

can you play crysis as a steam game. you can buy crysis from steam but i bought it as retail. this question is hard to wordIs crysis a steam game?
Both Crysis and Crysis Warhead can be found in the Steam store.



Crysis: http://store.steampowered.com/agecheck/a鈥?/a>

Crysis Warhead: http://store.steampowered.com/agecheck/a鈥?/a>



If you bought the retail version, you can add a non-Steam game into the library or you can activate it in Steam.



I hope this helps!