Fantasy World Summoned

Messaging inviting them to a game. Transported to dimension
Fights monsters to survive. Gain skills and titles. Hero, common etc
He is calculative. Gathers the strongest. Tank, swordsman, mage
Mage is obsessed with him, murderious jealousy.
They go on dungeon quests for supplies

Classroom summoned to another world, heroes
They singled out one, tried killing him, fell in dungeon
Released the demon king’s daughter from seal
The empire lied about demons being violent
Sends heroes to kill them, he protects them
The leader hero becomes self centred, kill crazy
He builds a nation for sub species