A human settled alien planet where even children are issued blasters and must be good at using them to kill constantly attacking lifeforms
29564
Trying to remember a book about a human male travelling to alien planet
54924
Alien studying human race for mental capacity and ESP
96874
90's TV; alien ships appear, tell humans to "do better"; turns out they wanted weapons
4270
Teens stranded in eco-system within alien ship, fighting for survival
11377
Sci-fi book, blue critters than only some people can see, kids fight the critters as they feed off energy and are a threat
142581
Short story describing an alien invasion where humans are the invaders
6599
Story about shapeshifting aliens trying to invade Earth, thwarted by biodiversity
119018
Space war, humans recreated, grown from plants with an alien female supervisor
41736
Looking for sci-fi short story anthology with a particular story of an Earth/Mars war children inheriting the surface
16900
A short story about finding an inhabitable planet and meeting aliens
68229
Mysterious contact by advanced aliens; leaves humans insane
93979
Help Identifying a Sci-Fi Book: Humans transported to alien world and given tasks to escape
5645
How does alien hostility work?
39899
Paperback novel about a man who kills a birdlike alien on his balcony with a watering can
50963
Story Identification: interplanetary war won by teleporting bombs past force fields
51413
Protagonist becomes the avatar of an alien deity and has to cope with adversary god
46635
Book series about aliens who put "caps" on people to control them