Yeah I've played a ton of older games. They were always visible in the Battlefield games -- 1942, Vietnam, 2, 2142, Bad Company 2, and 3 -- and in most other titles I've played. I see that you mentioned the FH2 mod above, but that was one that strived for realism (much like Red Orchestra) whereas PlanetSide 2 is as arcadish as they come. Can you name more than a few retail shooters that have invisible mines? I've rarely, if ever seen them in games.