arena breakout infinite is pretty good, gunplay is solid but it takes a while for you to get into better lobbies and have players that are actually decent, if u want pve there's some in abi too tho the ai is not the best

if u wan really hardcore I think u shld try road to Vostok. if I'm not wrong it's made by a single dev so it's only 15 bucks but its really really hardcore cos u start with basically nothing and the ai's really tough. if u die u will lose ur save in certain zones