Play free-to-play, with microtransactions games
Free-to-play games (commonly known as F2P) can be freely downloaded, installed and played without paying. Some free-to-play games offer the player the chance to buy items or services for real money (MMORPGs are the perfect example) in an online in-game marketplace. The cost of such items is often very low, hence the "micro" in "microtransactions". These items or services range from increased experience gain items to cosmetic enhancements, additional content, more character slots, etc.
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AdVenture Capitalist
simulation / idle clicker
Hyper Hippo Games
2015 
Moe! Ninja Girls
adventure / dating sim
NTT Solmare
2019NSFW 
Vega Conflict
strategy / MMORTS
KIXEYE
2015 
Therian Saga
RPG
Fatecraft
2012 
Gems of War
puzzle / tile-matching
Infinity Plus 2
2014 
Batheo
strategy / MMORTS
Clap Along
- 
Cabal Online
RPG / MMORPG
ESTsoft Corp
2005 
AChat
simulation / dating sim
AChat Animation Studios
2020NSFW 
NosTale
RPG / MMORPG
Entwell Co.
2017 
Big Bang Empire
RPG
Playata GmbH
2016NSFW 
Smite
action / MOBA
Hi-Rez Studios
2015 
Love Beat
action
CRAZYDIAMOND CO.
2016 
Booty Calls
adventure / tile-matching
3X Entertainment Limited
2018NSFW 
Sakura Clicker
RPG / idle clicker
Winged Cloud
2015NSFW 
Furcadia: the Second Dreaming
simulation
Dragon's Eye Productions
1996NSFW