achievement "immortal " and "look at the time" in what mode?

[Starvine]

to unlock achievement "immortal"and "look at the time" can we do it with easy mode or just can work in normal/hard mode?

[Maklaud]

You can do it in easy mode. For the immortal one, you can use the ingame backup system and load a previous game in case you die (and you probably will XD). For the "look at the time", just go for the main missions and you should have plenty of time.