IMPORTANT<br />
<br />
Play the game stories (Alien, Predator, Marine) at least onces in any order you like or the saves will look out of order.<br />
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If you don't care for correct looking time stamps, just use the Marine Save and it will unlock also the Nightmare Achievements for Alien and Predator. However i recommend to them individually and for that you need to stick to this Guide<br />
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Unlock Predator first: play the Tutorial on Nightmare. It's not hard but it's important that you do so.<br />
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Unlock Alien as second: load the save and finish the mission -> kill all enemies and run into the next room <br />
and open the gate. mission done and the achievement will unlock.<br />
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Unlock Marine last: load the save and finish the last checkpoint. just run down the sewers.<br />
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If you ask "Why in this Order?" If you use the Predator Save first, it will unlock Alien Nightmare too. Unless you don't care for that <img src='http://www.xpgamesaves.com/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' /><br />
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<br />
Grim Reaper Save<br />
<br />
Harvest the last two guys that you will encounter if you follow the way to your next mission target.<br />
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Special Thanks to petegild from xploder forums for providing the Original Nightmare Saves. I used them and saved at the last Checkpoint. This will save you 20 - 30 minute of playtime. Sorry, but the Predator Training Mission can't be saved, so you have play it ;-)<br />
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Grim Reaper is my own save.<br />
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Enjoy,<br />
zeropc

Aliens VS Predator Nightmare and Grim Reaper 04/06/2016
Aliens VS Predator Nightmare and Grim Reaper