PAL video mode, not NTSC. XL/XE not OS/A nor OS/B, maybe for 64K RAM? "HomeSoft" disk #228 works ferme. I haven't tried this download. Game resembles BattleZone, the original model 800 Atari BattleZone was lame. Later XEGS BattleZone is neat, but "Encounter" by Novagen is one of the all time greatest A8 games.