Because 1/72 or (not entirely accurate) 20mm scale is The One Scale for people my age and to give some opposition to the tide of beautiful 15mm and 28mm sized stuff here is an overview of my 20mm Sci-Fi wargaming stuff, mostly made for Stargrunt II and its worthy successor Tomorrow's war. As you will find it is an eclectic mix of 1/72 figures and kits, large 15mm stuff and random toys. Not all is pictured here but I refer to my other blogposts of Tomorrow's War especially.
The 1/72 figure shown for scale with the vehicles is a Dark Dream Studio SF figure.
Critical Mass Heavy Arc Fleet Grav tanks
Critical Mass Merc grav APCs
A Void grav tank destroyer.
Critical Mass heavy Merc tank
Revell Leopard IIs and a Critical Mass Heavy Merc tank
Revell APCs (2 Fuchses and a Marder)
A scratchbuilt APC from Aliens (cardboard and bits)
Dark Dream Studio 1/72 combat walkers
Dark Dream Studio 1/72 hunter/killers
Various scratchbuilt artillery pieces (AT gun, Missile platform and AA gun)
Some toys of unknown brand or type
RH Miniatures Colonial Marines
Dark Dream Studios 1/72 SF troopers
RH Miniatures Imperial troopers
Aliens for TW: comparative shots of a Khurasan Felid (small alien), a Caesar Delta Force trooper (above), a RH Miniatures battle armoured trooper (below) and a GW Tau (big alien)