Backlash is an enjoyable but ultimately dull ultra-fast 3D shoot-'em-up. Eliminator is a colourful 3D futuristic blasting/racing game. Custodian is pretty poor, and Mercenary is a superb, sprawling first person 3D arcade adventure.

Overall, it's a reasonable package.

Same criticisms, really. Mercenary and Eliminator are both great, but the other two games let the package down. Take it or leave it.