AFK
Away From Keyboard

FPS
Frames Per Second or First-Person Shooter

MMO
Massively Multiplayer Online

MMORPG
Massively Multiplayer Online Role-Playing Game

NPC
Non-Player Character

DPS
Damage Per Second

PvP
Player vs. Player

PvE
Player vs. Environment

RPG
Role-Playing Game

RTS
Real-Time Strategy

XP
Experience Points

HUD
Heads-Up Display

LAN
Local Area Network

GG
Good Game

OP
Overpowered

MVP
Most Valuable Player

HP
Health Points

MP
Mana Points

AoE
Area of Effect

QoL
Quality of Life (often referring to game improvements)

DLC
Downloadable Content

BR
Battle Royale

FFA
Free For All

BOT
A computer-controlled player (often short for "robot")

GGWP
Good Game, Well Played