GURPS 4th Edition
From Roll20 Wiki
Intro
GURPS 4th Edition CAN BE a very tactical game, even on simple fantasy settings with low power levels, player characters have many options on how to attack, how to defend, how to move and even how to dogde, and they still face many more different ways to get killed if they don't "get" the big picture of the situation.
Therefore, having a platform like Roll20 will help a lot players and game masters that like to keep their encounters very tactical, giving players a hand to figure where is cover, who has line of sight, etc.
however, remember to keep your game in a level of complexity that everybody will enjoy, not everyone likes spending an day to figure out if a sniper shot will hit.
Setting the Battlefield
WIP, gimme a sec :P