No worries, your English is fine
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We don't believe in an RNG loot drop system as we feel that it pulls Players out from the immersion factor and reinforces a more "gambling style" reward, rather than a hard work pay off. However there is still RNG, but the RNG is primarily going to be part of which encounters will be spawned against you. This works more in favor to the player as the weighted RNG will spawn specific encounters that will have asteroids with specific minerals that can be mined (Iron, Platinum, Titanium, etc.), or specific aliens that will have their own specific corpses and resources from those you can obtain (Silicoid aliens, Crystalline aliens, etc.).
Anything that is considered "Rare" can be found by exploring and finding the specific easter eggs hidden, and may be revealed at certain times during the campaign. We wish you luck in finding them all!