term for Miniature Games that use a grid/mapsheet

I've got hundreds of LotR:TMG plus spare starter sets and extra map packs going cheap if anyone wants to try that out, I like it as the rules are pretty simple but good - GW haven't changed them that much for there relaunched LotR tabletop game - and all the stats stats are on the base. Also bought some Haloclix stuff for me and my lad but didn't think the rules were as good and it was a pain in the arse needing to have teh individual carsd out to look up some of the stuff.