Acorn Arcade Review Tremor 2 is a game for Acorn Risc PCs, and it works fine on our original vintage ARM6 machine. It rather needs a megabyte of VRAM (nothing compared to your 32MB PC graohics cards!), and 8MB of DRAM wouldn't go amiss. A StrongARM chip also means that a lot of explosions don't really slow the game down noticeably. It's pretty poor programming, with 'normal' sprites (except for being 15-bit), and it even works on the A7000 with slightly reduced performance. It is vaguely based on Moonquake, which is itself based on some older game... Since Moonquake, the original author has released Marsquake.